August 19 (Mon) 
Afternoon Session 1 (12:4513:55) 
Koutarou Kyutoku 
Kyoto University 
Gravitationalwave and multimessenger astronomy^{ * } 
After the first direct detection in 2015, gravitationalwave astronomy with binaryblackhole mergers has become daily science. While multimessenger (i.e., gravitational and electromagnetic) detection of binary neutron stars has so far been limited to a single event in 2017, the number of gravitationalwave candidates from binaryneutronstar mergers is increasing in the current observing run of the LIGOVirgo Collaboration. Multimessenger astronomy may also become a routine in the near future. In this talk, I will review the current status and future prospects of gravitationalwave and multimessenger astronomy.

Afternoon Session 2 (14:1515:30) 
Miok Park 
Korea Institute for Advanced Study 
QuasilocalSmarr Relations 
A quasilocal Smarr relation is obtained from Euler's theorem for ndimensional
spacetimes and it is checked through several examples by calculating quasilocal
variables using the BrownYork quasilocal formalism, along with MannMarolf
counterterms. To find the entropy in the quasilocal frame, we define a quasilocal
free energy from the Euclidean gravity action with a Tolman temperature. In which
the entropy obtained through this method agrees with the usual Bekenstein
Hawking entropy.

Yuki Yokokura 
RIKEN 
Black Hole as a Quantum Field Configuration 
We study quantum states of black holes in field theory.
First, we consider time evolution of a spherical collapsing
matter, including the back reaction of particle creation
that occurs in the timedependent spacetime. As a result, a
compact highdensity star with no horizon or singularity is
formed and eventually evaporates. This is a quantum black
hole. In this talk, we investigate the metric $g_{\mu\nu}$
and state $\psi \rangle$ expressing this picture and
satisfying the semiclassical Einstein equation
$G_{\mu\nu}=8\pi G \langle \psiT_{\mu\nu}\psi \rangle$.
We also discuss how the entropy area law appears in this
view.

Nobuyoshi Ohta 
Kindai University 
Asymptotic Safety and the Dimension of the Critical Surface 
After brief summary of the asymptotic safety approach to quantum gravity, we study Einstein theory plus cosmological constant, scalar curvature square and Ricci curvature square on general backgrounds, and discuss what is the dimension of critical surface, which is the important clue to the formulation of nonperturbatively renormalizable theory of gravity.

Afternoon Session 3 (15:4517:00) 
Takaaki Ishii 
Kyoto University 
Black resonators and geons in AdS$_5$ 
Rotating black holes exhibit superradiant instability in AdS spacetime. Black hole solutions
incorporating the backreaction of the instability have been recently found and called black
resonators. I will talk about constructing a class of black resonators emerging from the onset
of a superradiant instability of the MyersPerryAdS black hole with equal angular momenta in
5D AdS spacetime.

Masataka Matsumoto 
Chuo University 
Nonequilibrium Phase Transitions and Spontaneous Symmetry Breaking in
Holography 
The holographic probe brane system exhibits the nonlinear conductivity in the
presence of an electric field. Associated with this nonlinearity, the system shows
the currentdriven nonequilibrium phase transition. We study this nonequilibrium
phase transition in the case of massless quark. We find that spontaneous
symmetry breaking occurs if we apply not only an electric field but a magnetic
field. We also analyze the critical phenomena associated with this nonequilibrium
phase transition.

Shuichi Yokoyama 
Yukawa Institute for Theoretical Physics 
Holographic geometry for nonrelativistic systems emerging from generalized flow equations 
I will speak about the holographic construction of bulk system incorporating a flow equation. In particular I will explain my recent work on the application of this framework to a generic nonrelativistic CFT. The resulting geometry is a hybrid geometry of Lifshitz and Schrödinger spacetimes, which reduces to each of them by considering special nonrelativistic models.

Afternoon Session 4 (17:1518:30) 
Yoshinori Matuso 
Osaka University 
Nuclear states and spectra in holographic QCD 
A new method to study nuclear physics via holographic QCD is proposed. Multiple baryons in the SakaiSugimoto background are described by a matrix model which is a low energy effective theory of Dbranes of the baryon vertices. We study the quantum mechanics of the matrix model and calculate the eigenstates of the Hamiltonian. The obtained states are found to coincide with known nuclear and baryonic states, and have appropriate statistics and charges. Calculated spectra of the baryon/nucleus for small baryon numbers show good agreement with experimental data. For hyperons, the GellMannOkubo formula is approximately derived. Baryon resonances up to spin 5/2 and isospin 5/2 and dibaryon spectra are obtained and compared with experimental data. The model partially explains even the magic numbers of light nuclei, N=2, 8 and 20.

Hiromasa Watanabe 
University of Tsukuba 
Partial Deconfinement 
We argue the existence of “partially deconfined phase” in some SU(N) gauge theories, which is
in between the confined and deconfined phases.
We characterize this phase in terms of the Polyakov line phases and its distribution. Also, we
study examples of theories in which the partially deconfined phase exists and find the relation
to the GrossWittenWadia transition.
The partially deconfined phase is conjectured to be the counterpart of the small black hole
phase in the context of the gauge/string duality. We discuss possible applications in this
context.

Ryo Yokokura 
KEK 
Topological order in the colorflavor locked phase of (3+1)dimensional U(N) gaugeHiggs system 
We study a (3+1)dimensional U(N) gauge theory with Nflavor fundamental scalar fields, whose colorflavor locked (CFL) phase has topologically stable nonAbelian vortices. The U(1) charge of the scalar fields must be Nk+1 for some integer k in order for them to be in the representation of U(N) gauge group. This theory has a Z$_{Nk+1}$ oneform symmetry, and it is spontaneously broken in the CFL phase, i.e., the CFL phase is topologically ordered if k is not 0. We also find that the world sheet of topologically stable vortices in CFL phase can generate this oneform symmetry.

August 20 (Tue) 
Morning Session 1 (9:0010:10) 
Richard Szabo 
HeriotWatt University 
The geometry of double field theory ^{ * } 
I will review recent progress in understanding the geometric realisations of doubled spacetimes as they occur in double field theory, and how they entail precise descriptions of Tduality and of nongeometric string backgrounds.

Morning Session 2 (10:3011:45) 
Yuta Sekiguchi 
University of Bern 
$O(d,d)$ transformations preserve classical integrability 
In our recent paper [arXiv:1907.03759], we studied the action of global $O(d,d;\mathbb{R})$ deformations on the Lax pairs of WZNW models using the doubled formalism. We explicitly constructed $O(d,d)$deformed Lax pairs by applying the socalled O(d,d)map to the undeformed but gauged Lax pairs. The conclusion is that any global $O(d,d;\mathbb{R})$ transformation preserves classical integrability, and the local conserved charges in the undeformed model should be mapped to the nonlocal ones after the deformation as argued in [arXiv:0711.0707].
In this talk, after showing some motivation of studying the $O(d,d)$ transformations from the angle of integrability, I will give a brief review of Lax pairs and unpackage the doubled formalism to learn the $O(d,d)$ map. Then as a concrete and small example I plan to briefly present how to construct $O(2,2)$deformed (currentcurrent deformed) Lax pairs starting from the WZNW model on the threesphere with nonzero $H$flux.

Hiroaki Matsunaga 
Czech Academy of Sciences 
Lightcone string field theory from covariant string field theory 
We extract a lightcone string field theory from Witten’s covariant string field
theory on the basis of the homological perturbation.
The covariant string field splits into the lightcone string field and trivial excitations
of BRST quartets:
The latter generates the gauge symmetry and covariance.
A new lightcone theory is obtained by pathintegrating it out from the covariant
theory.
We show that the process of pathintegratingout fields is described by the
homological perturbation lemma (for Ainfinity) and thus our new lightcone theory
has the same treelevel amplitudes as the Witten theory.

Yuji Okawa 
The University of Tokyo 
Nonperturbative definition of closed string theory with holes in the
worldsheet via open string field theory 
In typical examples of the AdS/CFT correspondence, closed string
theory with holes in the worldsheet is assumed to be equivalent in a
low energy limit to closed string theory without holes in the world
sheet on a curved background such as $AdS_5 \times S^5$. In the case
of the bosonic string, we claim that open string field theory on $N$
coincident Dbranes can be used to provide a nonperturbative
definition of such closed string theory with holes in the worldsheet
based on the fact that the $1/N$ expansion of correlation functions of
gaugeinvariant operators reproduces the closed string perturbation
theory with the moduli space of Riemann surfaces being precisely
covered.

Morning Session 3 (12:0013:15) 
Matsuo Sato 
Hirosaki University 
Topological String Geometry 
Perturbative string amplitudes are correctly derived from the string geometry theory, which is one of the candidates of a nonperturbative formulation of string theory. In order to derive nonperturbative effects rather easily from the theory, we formulate topological string geometry theory by restricting the string geometry theory to its topological sector. We derive the perturbative partition function of the topological string theory from fluctuations around a classical solution in the topological string geometry theory. Thanks to the twisting, the action of the topological string geometry theory can be written in a Qexact form. Thus, we can utilize the localization method to obtain nonperturbative corrections to the topological string partition function.

Hikaru Ohta 
SOKENDAI 
Effective potential for revolving Dbranes in superstring theory 
We study the short distance behavior of the effective potential of open strings
compute the oneloop partition function for the Dbranes revolving around each
other. I will explain how to compute the oneloop partition function of the open
strings stretched between the revolving Dbranes, from which we can extract the
shortdistance behavior of the effective potential.

Sota Hanazawa 
Ibaraki University 
Nonabelian extension of Supersymmetric DBI Equations in Pure Spinor Formulation 
We have examined the BRS invariance of the open pure spinor
superstring to derive the supersymmetric DiracBornInfeld (DBI)
equations of motion for a D$p$brane.
These equations are consistent with the supersymmetric DBI
equations for a D9brane obtained by Berkovits and Pershin.
They also analyzed nonabelian backgrounds up to quadratic order
in $\eta$, socalled boundary fermion, which is a worldvolume
fermion in the representation of the $SU(N)$ gauge subgroup.
In this talk, we extend previous results to nonabelian DBI
equations of motion for coincident D$p$branes including all
$\eta$'s.

Afernoon Session 1 (14:3015:45) 
ShengHong Lai 
National Chiao Tung University 
The SL(K+3,C) Symmetry of the Bosonic String Scattering
Amplitudes 
We discover that the exact string scattering amplitudes
(SSA) of three
tachyons and one arbitrary string state, or the Lauricella
SSA (LSSA), in the
$26D$ open bosonic string theory can be expressed in terms
of the basis
functions in the infinite dimensional representation space
of the $SL(K+3,%
%TCIMACRO{\U{2102} }%
%BeginExpansion
\mathbb{C}
%EndExpansion
)$ group. In addition, we find that the $K+2$ recurrence
relations among the
LSSA discovered by the present authors previously can be
used to reproduce the
Cartan subalgebra and simple root system of the $SL(K+3,%
%TCIMACRO{\U{2102} }%
%BeginExpansion
\mathbb{C}
%EndExpansion
)$ group with rank $K+2$. As a result, the $SL(K+3,%
%TCIMACRO{\U{2102} }%
%BeginExpansion
\mathbb{C}
%EndExpansion
)$ group can be used to solve all the LSSA and express them
in terms of one
amplitude. As an application in the hard scattering limit,
the $SL(K+3,%
%TCIMACRO{\U{2102} }%
%BeginExpansion
\mathbb{C}
%EndExpansion
)$ group can be used to directly prove Gross conjecture,
which was previously corrected and proved by the
method of decoupling of zero norm states.

Ryota Kojima 
SOKENDAI 
Sign flip triangulation of the amplituhedron 
In this talk, I will talk about the triangulation of the amplituhedron. To obtain higher
point amplitude from the general amplituhedron, we need to triangulate it into a
simple one. There is some way to triangulate the amplituhedron and some of this
gives new representations of the amplitude. I will briefly explain the amplituhedron
and its property, then I will talk about the new representation of the amplitude from
the sign flip triangulation.

Sanefumi Moriyama 
Osaka City University 
Symmetry Breaking in Quantum Curves and Super ChernSimons Matrix Models 
M2brane is one of the central topics in understanding nonperturbative effects in string theory. Recently it was proposed that multiple M2branes on various backgrounds are described by various superconformal ChernSimons theories, whose partition function reduces to a matrix model after applying the localization technique. These super ChernSimons matrix models are known to correspond to quantum version of algebraic curves. From the viewpoint of symmetry, the algebraic curve of genus one, called the del Pezzo curve, enjoys symmetry of the exceptional algebra, while the super ChernSimons matrix model is described by the free energy of topological strings on the del Pezzo background with the symmetry broken. In this talk, I introduce the quantum version of algebraic curves for our purpose of studying M2branes and explain how studies of the symmetry aspects help in understanding M2branes.

Poster Session 1 (16:0018:30) 
Yugo Abe 
NIT, Miyakonojo College 
Smatrix Unitarity in Higher Derivative gravity with matter 
We investigate the ultraviolet (UV) behavior of twoscalar elastic scattering with
graviton exchanges in higher curvature gravity theory.
In the Einstein gravity, matter scattering is shown not to satisfy the unitarity bound
in tree level at high energy.
Among a few possible directions to the UV completion of Einstein gravity, string
theory, modiﬁed gravity, inclusion of highmass/highspin states,
we take $R_{\mu\nu}^2$ gravity coupled to matter.
We show that the matter scattering with graviton interactions satisﬁes the unitarity
bound at high energy,
even with the negative norm states due to the higher order derivatives of metric
components.
The difference in this unitarity property of the two gravity theories is probably
connected to that in another UV property, namely renormalizability property of the
two.

Tomohiro Furukawa 
Osaka City University 
ABJM matrix model and twodimensional Toda Lattice
hierarchy 
In the ABJM matrix model, the one point functions (one
point functions of the half BPS Wilson loop in the ABJM
theory) satisfy the JacobiTrudi identity.This fact suggest
the existence of the integrable structure in the ABJM
matrix model. We made it clear. In particular, the one
point functions in the ABJM matrix model has the structure
corresponding to the mKP hierarchy and the two point
functions has the structure corresponding to the two
dimensional Toda lattice hierarchy.

Takuya Hirose 
Osaka City University 
Cancellation of Oneloop Corrections to Scalar Masses in YangMills Theory with
Flux Compactification 
We calculate oneloop corrections to the mass for the zero mode of scalar field in
a sixdimensional YangMills theory compactified on a torus with magnetic flux. It
is shown that these corrections are exactly cancelled thanks to a shift symmetry
under the translation in extra spaces. This result is expected from the fact that the
zero mode of scalar field is a NambuGoldstone boson of the translational
invariance in extra spaces.

Kenji Hotta 
Hokkaido University 
Creation of D9braneantiD9brane Pairs in Time Dependent Background 
Recently, we have investitated Unruh effect for closed strings and for open strings on D9braneantiD9brane pairs, and discuss the creation of D9braneantiD9brane pairs for highly accelerated observers. In this talk, we consider a simple time dependent background, in which the spacetime becomes Minkowski spacetime in the far past and future, and investigate the HawkingUnruh effect of open strings on D9braneantiD9brane pairs. We show that D9braneantiD9brane pairs are created in the far future. Then we propose that if there is an accelerated object or if the metric is time dependent, not only closed strings but also D9braneantiD9brane pairs are created around them. We also discuss the creation of D9braneantiD9brane pairs in the case of the black hole formation.

Shuta Ishigaki 
Chuo University 
Analysis of bound states in holographic conductors 
The AdS/CFT correspondence is a powerful tool to analyze nonequilibrium systems. By using this correspondence, one can calculate the nonlinear conductivity of a charged manybody system interacting with a heat bath. In some cases, the system shows a negative differential conductivity (NDC) in some parameter regions. NDC is often seen in stronglycorrelated electron systems and it is a nonequilibrium phenomenon far from equilibrium. However, the mechanism of the NDC is not still understood completely. We analyze the bound states consisting of a charged particle and an antiparticle to explore the mechanism of the NDC. We find that the lifetime of the bound states grows as increasing the electric field in the NDC regions. This implies the bound states play an important role in the realization of the NDC. In our presentation we will explain the result and the interpretation.

Nahomi Kan 
NIT, Gifu College 
Accelerating cosmologies in an integrable model with
noncommutative minisuperspace variables 
We study classical and quantum noncommutative cosmology with a
Liouvilletype scalar degree of freedom. The noncommutativity is
imposed on the minisuperspace variables through a deformation of
the Poisson algebra. In this paper, we investigate the effects of
noncommutativity of minisuperspace variables on the accelerating
behavior of the cosmic scale factor. The probability distribution
in noncommutative quantum cosmology is also studied and we
propose a novel candidate for interpretation of the probability
distribution in terms of noncommutative arguments.

Man Hea Kim 
Kyungpook National University 
The Operator Product Expansions in the N=4 Orthogonal Wolf Space
Coset Model 
Some of the operator product expansions (OPEs) between the
lowest $SO(4)$ singlet higher spin$2$ multiplet of spins
$(2, \frac{5}{2}, \frac{5}{2}, \frac{5}{2}, \frac{5}{2},
3, 3, 3, 3, 3, 3, \frac{7}{2}, \frac{7}{2}, \frac{7}{2},
\frac{7}{2},
4)$
in an extension of the large ${\cal N}=4$ (non)linear
superconformal
algebra were constructed in the ${\cal N}=4$ superconformal
coset
$\frac{SO(N+4)}{SO(N) \times SO(4)}$
theory with $N=4$ previously.
In this paper, by rewriting the above OPEs with $N=5$,
the remaining undetermined OPEs are completely determined.
There exist additional $SO(4)$ singlet higher spin$2$
multiplet,
six $SO(4)$ adjoint higher spin$3$ multiplets,
four $SO(4)$ vector higher spin$\frac{7}{2}$ multiplets,
$SO(4)$ singlet higher spin$4$ multiplet
and
four $SO(4)$ vector higher spin$\frac{9}{2}$ multiplets
in the right hand side of these OPEs.
Furthermore, by introducing the arbitrary coefficients
in front of the composite fields in the right hand sides
of the above complete 136 OPEs,
the complete structures of the above OPEs
are obtained by using various Jacobi
identities for generic $N$.
Finally, we describe them as one single ${\cal N}=4$ super
OPE between the above lowest
$SO(4)$ singlet higher spin$2$ multiplet in the
${\cal N}=4$ superspace.

Smain Kouadik 
Université de Médéa 
Construction of Translationinvariant U(N) non commutative gauge model 
We build a non commutative unitary gauge group model preserving translational invariance. It describes the interaction of Dirac eld with the Gauge eld. The interaction term is expanded as a power series resulting from the introduction of the inverse covariant derivative. The consistancy of the model is sustained by the fact that the Ward identity at the tree level holds

Yasunari Kurita 
Kanagawa Institute of Technology 
Thermodynamics of AdS$_3$ pure gravity : extremal CFTs vs.
semiclassical gravity 
The set of extremal CFTs is a candidate for AdS$_3$ pure
quantum gravity, as suggested by Witten. We investigate
thermodynamic properties of extremal CFTs in comparison with
semiclassical gravity and find new phase transitions between
BTZ and something unknown. It might indicate that they are
not suitable for AdS$_3$ pure quantum gravity.

Ping Kwan Man 
Waseda University 
BI model  An Extension of Starobinsky model induced by SUGRA 
Cosmological inflation is a powerful solution to the flatness and
horizon problems at the beginning of the standard Big Bang
scenario. So far, being motivated by modified gravity, Starobinsky
model has been the most promising prediction of inflation that it
satisfies all the observation data. On the other hand, supergravity
(SUGRA) is the best model to unify gravity with particle physics
beyond the Standard Model of elementary particles and beyond
the Standard (ΛCDM) Model of cosmology. In this talk/ poster
session, the integration between SUGRA and Starobinsky model
will be shown, and the parameter scales in the SUGRA model
required to integrate with Starobinsky model will also be
discussed.

Tatsuya Mori 
Tokyo Institute of Technology 
Finite N corrections to the superconformal index of orbifold quiver gauge theories 
We study the finite $N$ AdS/CFT correspondence between the Type IIB string theories on AdS$_5 \times S^5/\Gamma$ and quiver gauge theories.
We assume that D3branes wrapping on the threecycles in the internal space give the finite $N$ corrections to the index.
We calculate the index of wrapped D3branes for each sector of wrapping numbers and get the nontrivial coincidence for leading finite $N$ corrections in comparison with the localization results from
the gauge theory.
For the comparison, we need to establish the relation between the wrapping numbers of D3branes and the baryonic charges of operators in quiver gauge theories.
In this poster, we explain the relation in detail.

Sota Nakajima 
Osaka City University 
Exponentially suppressed cosmological constant with enhanced
gauge symmetry in heterotic interpolating models 
A few ninedimensional interpolating models with two parameters
are constructed and the massless spectra are studied by
considering compactification of heterotic strings on a twisted
circle with Wilson line. It is found that there are some
conditions between radius R and Wilson line A under which the
gauge symmetry is enhanced. In particular, when the gauge
symmetry is enhanced to $SO(18) \times SO(14)$, the cosmological
constant is exponentially suppressed. We also construct a non
supersymmetric string model which is tachyonfree in all regions
of moduli space and whose gauge symmetry involves $E_8$.

Yuta Nasuda 
Tokyo University of Science 
SUSY QM with Conditional Shape Invariance and the Solvability 
Exactly solvable quantum mechanics (or SUSY QM) has extensively been studied for many years. It is known that the idea of shape invariance is the sufficient condition for exact solvability and is crucial for finding solutions. Recently, a powerful way of constructing solutions has proposed where the modified concept of shape invariance is applied. We present the prescription and thoroughly discuss the mathematical implications.

Kenta Shiozawa 
Kitasato University 
Doubled Aspects of Vaisman Algebroid and Gauge Symmetry in Double
Field Theory 
The metric algebroid proposed by Vaisman (the Vaisman algebroid)
governs the gauge symmetry algebra generated by the Cbracket in double
field theory (DFT). We show that the Vaisman algebroid is obtained by an
analogue of the Drinfel’d double of Lie algebroids. Based on a geometric
realization of doubled spacetime as a paraHermitian manifold, we
examine exterior algebras and a paraDolbeault cohomology on DFT and
discuss the structure of the Drinfel’d double behind the DFT gauge
symmetry. Similar to the Courant algebroid in the generalized geometry,
Lagrangian subbundles $(L,\tilde{L})$ in a paraHermitian manifold play
Diraclike structures in the Vaisman algebroid. We find that an algebraic
origin of the strong constraint in DFT is traced back to the compatibility
condition needed for $(L,\tilde{L})$ be a Lie bialgebroid. The analysis
provides a foundation toward the “coquecigrue problem” for the gauge
symmetry in DFT.

Tatsuya Sugimoto 
Yukawa Institute for Theoretical Physics 
Closed string field theory with cyclic Linfinity structure 
We construct the gaugeinvariant action for heterotic and type II
string field theories. We give a construction of string products
that realizes the cyclic Linfinity structure.

Inori Ueba 
Kobe University 
Extended supersymmetric quantum mechanics from symmetries in higher
dimensional Dirac action 
In this talk, we discuss the structure of Nextended supersymmetric quantum
mechanics with central charges
hidden in the 4D mass spectrum of the higher dimensional Dirac action.
This supersymmetric quantum mechanics results from symmetries in curved extra
dimensions, and the supercharges tell us a relationship among the KaluzaKlein
mode functions with degenerate 4D mass eigenvalues
due to the degrees of freedom of the higher dimensional spinor.
We also show that the mode functions correspond to the BPS states in this
supersymmetry algebra.

Kazushi Yamashiro 
Shizuoka University 
Relationship between information geometry for
renormalization group and bulk geometry in gravity dual 
In this poster, we study relationship between information
geometry for renormalization group and bulk geometry in
gravity dual. On the QFT side, the information metric in a
theory perturbated from a conformal field theory is
calculated along the RG flow. On the other hand, by
following the GKPWitten relation, we find the
corresponding classical solution on the gravity side that
asymptotically reduce to the AdS solution. Finally, we find
relationship between this information metric and the
geometry described by the classical solution.

August 21 (Wed) 
Morning Session 1 (9:0010:10) 
Guilherme L. Pimentel 
University of Amsterdam 
Bootstrapping Inflationary Fluctuations^{ * } 
In flat space, four point scattering amplitudes at weak coupling can be fully determined from Lorentz symmetry, unitarity and causality. The resulting scattering amplitude depends on model details only through coupling constants and the particle content of the theory. I will show how the analogous story works in the case of inflationary fluctuations. I will present explicit expressions for weakly coupled inflationary three and fourpoint functions, whose shapes depend on the field content of the theory, and do not depend on the specific inflationary model, as long as the fluctuations minimally break de Sitter symmetry. This ``cosmological bootstrap” is a first step towards classifying all possible shapes of primordial nongaussianity, which can be searched for in experimental data. If time permits, I will also present results for cosmological correlation functions of spinning fields.

Morning Session 2 (10:3011:45) 
Suro Kim 
Kobe University 
Heavy spinning particles from signs of primordial nonGaussianities 
Within the socalled cosmological collider program, the nonanalytic behavior of
primordial nonGaussianities has been studied as a probe of particles near the
Hubble scale, analogously to the resonance signal in particle colliders. On the
other hand, it has not been explored well how to probe particles heavier than the
Hubble scale. In this talk, to enlarge the scope of the cosmological collider, we
demonstrate that the signs of Wilsoncoefficients of the inflaton effective
couplings can be used to read off spins of such heavy particles. Then, we discuss
how to determine the signs of the Wilsoncoefficients using cosmological
observations, focusing on the analytic part of the primordial nonGaussianities.

Yermek Aldabergenov 
Chulalongkorn University 
Unified models of inflation, dark energy, and highscale SUSY breaking 
I review recent developments in N=1 supergravitybased models of
Starobinskylike inflation, dark energy (in the form of the cosmological
constant), and highscale SUSY breaking. The models utilize SU(1,1)/U(1)
Kahler manifolds with Polonyitype superpotentials, and alternative FI terms
 that do not require gauging of Rsymmetry  for de Sitter uplift. In some
cases the models contain superheavy dark matter candidates as well.

Siyi Zhou 
The Hong Kong University of Science and Technology 
String Regge trajectory on de Sitter space and implications
to inflation 
We study the spectrum of semiclassical rotating strings on
de Sitter space and its consistency, generalizing the
GubserKlebanovPolyakov (GKP) string on antide Sitter
space. Even though a naive extrapolation of the linear
Regge trajectory on flat space implies a violation of the
Higuchi bound (a unitarity bound on the mass of higherspin
particles in de Sitter space), the curved space effects
turn out to modify the trajectory to respect the bound.
Interestingly, we find that there exists a maximum spin for
each Regge trajectory as a consequence of accelerated
expansion, which is helpful to make the spectrum consistent
with the Higuchi bound, but at the same time it could be an
obstruction to stringy UV completion based on an infinite
higherspin tower. By pushing further this observation, we
demonstrate that the vacuum energy $V$ inflating the
universe has to be bounded by the string scale $M_s$ as
$V\lesssim M_s^4$, if UV completion is achieved by the
leading Regge trajectory. Its application to inflation at
the early universe implies an upper bound on the tensorto
scalar ratio, $r\lesssim 0.01\times(M_s/10^{16}
\text{GeV})^{4}$, which is within the scope of the near
future CMB experiments.

Morning Session 3 (12:0012:50) 
Nobuyuki Matsumoto 
Kyoto University 
Stochastic processes of matrix models and the emergence of quantum spacetime 
Towards formulating quantum gravity, we discuss how spacetime emerges from
randomness. In [Fukuma, NM, Umeda [arXiv:1705.06097]], we defined for a given
stochastic process 'the distance between configurations', which enumerates the
difficulty of transition and introduces a geometry to the stochastic system. In this
talk, we discuss the geometry described by stochastic processes of matrix models
by identifying the eigenvalues as spacetime coordinates. We show that the large N
limit gives a stochastic system of one eigenvalue moving in the background where
other eigenvalues condensate. We investigate the geometry of this oneeigenvalue
stochastic system, and argue that this corresponds to the classical geometry
probed by a Dinstanton in noncritical string theory. This talk is based on ongoing
work with M. Fukuma (Kyoto University).

Kento Sugiyama 
Shizuoka University 
Hermitian matrix model with cusp potential 
In this talk, we investigate zero and one dimensional Hermitian matrix models with
cusp potentials at large N. We show that large N phase transitions in these models
are quite different from the third order phase transitions in the ordinary polynomial
potential cases. Particularly the zero dimensional matrix models exhibit
unexpected behaviors.

Afternoon Session 1 (14:0515:15) 
Pablo Soler 
Heidelberg University 
Swampland Conjectures ^{ * } 
An very large number of four dimensional effective field theories can be obtained from compactifications of string theory, forming a set known as the landscape of string theory. It has been suggested that, beyond this landscape, there exist consistentlooking effective field theories that cannot be consistently embedded into UV complete theories of quantum gravity, in particular into string theory. They are said to belong to the swampland. In this talk, I will describe some of the conjectures that define the swampland (weak gravity, distance, deSitter and antideSitter conjectures) and some of their phenomenological implications.

Afternoon Session 2 (15:3516:50) 
YunLong Zhang 
Yukawa Institute for Theoretical Physics 
Hyperbolic field space and swampland conjecture for DBI scalar 
We study a model of two scalar fields with a hyperbolic field space and show that it reduces to a singlefield DiracBornInfeld (DBI) model in the limit where the field space becomes infinitely curved. We apply the de Sitter swampland conjecture to the twofield model and take the same limit. It is shown that in the limit, all quantities appearing in the swampland conjecture remain welldefined within the singlefield DBI model. Based on a consistency argument, we then speculate that the condition derived in this way can be considered as the de Sitter swampland conjecture for a DBI scalar field by its own. The condition differs from those proposed in the literature and only the one in the present paper passes the consistency argument.

Yoshinori Honma 
Meiji Gakuin University 
Distributions of nonsupersymmetric flux vacua in Type IIB/Ftheory
compactifications 
We examine vacuum structures of effective theories of moduli fields in the
frameworks of Type IIB and Ftheory ﬂux compactiﬁcations. Imposing the noscale
structure for the volume modulus, for two explicit examples we numerically
investigate distributions of a huge number of local minima of effective potential in
the complex structure and dilaton directions in moduli fields. Our results for
distributions of nonsupersymmetric minima exhibit an interesting behavior about
string coupling dependence of the vacuum energy. This talk is based on a
collaboration with H. Otsuka (KEK).

Hajime Otsuka 
KEK 
Landscape of fourdimensional Ftheory flux vacua 
We search for the supersymmetric and nonsupersymmetric
vacua in Ftheory flux compactifications.
By checking the distributions of both vacua against the
AshokDouglas formula, we count the number of vacua
and the size of supersymmetry breaking in the global
Ftheory context.
This work is based on a collaboration with
Y. Honma (Meiji Gakuin university).

Afternoon Session 3 (17:0518:20) 
Nakwoo Kim 
Kyung Hee University 
Solving Massdeformed Holography Perturbatively 
We study supergravity BPS equations which correspond to mass
deformation of some representative AdS/CFT examples. The field
theory of interest are N=4, D=4 super YangMills, the ABJM model in
D=3, and the BrandhuberOz fixed point in D=5. For these gauge
theories the free energy with mass terms for matter multiplets is
calculable in largeN limit using supersymmetric localization technique.
We suggest a perturbative method to solve the supergravity equations.
For the dual of massdeformed ABJM model we reproduce the known
exact solutions. For the massdeformed BrandhuberOz theory our
method gives the holographic free energy in analytic form. For N=2*
theory our result is in good agreement with the localization result.

Hidenori Fukaya 
Osaka University 
Mathematical proof for "physicistfriendly" reformulation of Atiyah
PatodiSinger index 
The AtiyahPatodiSinger index theorem describes the bulkedge
correspondence of symmetry protected topological insulators. The
mathematical setup for this theorem is, however, not directly related
to the physical fermion system, as it imposes on the fermion fields a
nonlocal boundary condition known as the "APS boundary condition"
by hand, which is unlikely to be realized in the materials. In 2017, we
showed that the same integer as the APS index can be obtained from
the etainvariant of the domainwall Dirac operator. In this work, we
invite three mathematicians to our group and prove that this
correspondence is not a coincidence but generally true. This work is in
collaboration with M.Furuta, S.Matsuo, T.Onogi, Yamaguchi and
Yamashita.

Naoki Kawai 
Osaka University 
AtiyahPatodiSinger index theorem on a lattice 
AtiyahSinger index theorem on a lattice without boundary is well
understood owing to the seminal
work by Hasenfratz. But its extension to the system with boundary ( the
socalled AtiyahPatodiSinger index theorem), which surprisingly
plays a crucial role in Tanomaly cancellation between bulk and edge
modes in 3+1 dimensional topological matters, is known only in the
continuum theory and no lattice realization has been made so far.
In this work, we try to nonperturbatively define an alternative index
from the lattice domainwall fermion in 3+1 dimensions. We will show
that this new index in the continuum limit, converges to the Atiyah
PatodiSinger index defined on a manifold with boundary, which
coincides with the surface of the domainwall. This work is
collaboration with Fukaya, Matsuki, Mori, Onogi, and Yamaguchi.

August 22 (Thu) 
Morning Session 1 (9:0010:10) 
Kentaroh Yoshida 
Kyoto University 
TTbar deformation and holography ^{ * } 
In recent years, inspired by Sasha Zamolodchikov's pioneering work, TTbar deformation (more specifically, deformation with the determinant of the energymomentum tensor) had been nergetically studied. In particular, for the TTbar deformation of 2D quantum field theory, interesting properties have been understood beyond conformal symmetry or integrability.
In this talk, I will start with an elementary explanation of the TTbar deformation and outline some results for the TTbar deformation in the context of AdS/CFT.

Morning Session 2 (10:3011:45) 
Mitsuhiro Nishida 
Gwangju Institute of Science and Technology 
Entanglement and Renyi Entropy of Multiple Intervals in $T\overline{T}$Deformed
CFT and Holography 
We study the entanglement entropy (EE) and the Renyi entropy (RE) of multiple
intervals in twodimensional $T\overline{T}$deformed conformal field theory
(CFT) at finite temperature by field theoretic and holographic methods. First, by
the replica method with the twist operators, we construct the general formula of
the RE and EE up to the first order of a deformation parameter. By using our
general formula, we show that the EE of multiple intervals for a holographic CFT is
just a summation of the single interval case even with the small deformation. This
is a nontrivial consequence from the field theory perspective, though it may be
expected by the RyuTakayanagi formula in holography. However, the deformed RE
of the two intervals is a summation of the single interval case only if the
separations between the intervals are big enough. It can be understood by the
tension of the cosmic branes dual to the RE. We also study the holographic EE for
single and two intervals with an arbitrary cutoff radius (dual to the
$T\overline{T}$ deformation) at any temperature. We confirm our holographic
results agree with the field theory results with a small deformation and high
temperature limit, as expected. For two intervals, there are two configurations for
EE: disconnected ($s$channel) and connected ($t$channel) ones. We investigate
the phase transition between them as we change parameters: as the deformation
or temperature increases the phase transition is suppressed and the disconnected
phase is more favored.

Suguru Okumura 
Kyoto University 
Gravitational perturbations as $T\bar{T}$deformations in 2D
dilaton gravity systems 
We consider gravitational perturbations of 2D dilaton gravity
systems and show that these can be recast into $T\bar{T}$
deformations (at least) under certain conditions, where T means
the energymomentum tensor of the matter field coupled to a
dilaton gravity. In particular, the class of theories under this
condition includes a JackiwTeitelboim (JT) theory with a
negative cosmological constant including conformal matter fields.
This is a generalization of the preceding work on the flatspace
JT gravity by S. Dubovsky, V. Gorbenko and M. Mirbabayi
[arXiv:1706.06604].

Tomoki Nosaka 
Korea Institute for Advanced Study 
Quantum chaos transition in a twosite SYK model dual to an eternal traversable
wormhole 
Some quantum chaotic system has variant chaoticity depending on the
temperature or the coupling constants, and enjoys a sharp chaos/integrable
transition. To identify the gravitational phenomena corresponding to this
transition, when the system has a gravity dual, we studied the chaos of a
deformation of the SYK model proposed by [arXiv:1804.00491] which is dual to global
AdS$_2$ geometry. As a result, we obtain an evidence indicating that the
chaos/integrable transition is dual to the HawkingPage transition.

Morning Session 3 (12:0013:15) 
Lento Nagano 
The University of Tokyo 
Interface entropy in 4d N=2 SCFTs 
We construct a codimensionone defect (i.e., interface, or domain wall) in a 4d N=2
SCFT. We then define its entropy as an entanglement entropy and compute it via
SUSY localization.
We show that the interface entropy can be expressed in terms of a particular linear
combination of analytically continued Kahler potentials called Calabi's diastasis, as
conjectured in arXiv:1805.09981 by Goto and Okuda. The ambiguity in each Kahler
potential due to Kahler transformations (equivalently the ambiguity due to finite
counterterms in the partition functions that we use to express the interface
entropy) cancels out in this combination.

Yuya Kusuki 
Yukawa Institute for Theoretical Physics 
Light cone bootstrap in 2D CFTs 
We utilize the lightcone bootstrap technique to probe two
dimensional conformal field theories (CFTs) dual to quantum
gravity theories in AdS${}_3$ (i.e., holographic CFTs). We show
that the twist spectrum at large spin can be realized by the
fusion rules of the {\it Liouville CFT}, which is the two
dimensional counterpart of the statement that the twist spectrum
in any higherdimensional CFTs can be approximated by that of a
generalized free field theory in that limit.
A key tool is the fusion matrix. We want to emphasize that
besides solving the bootstrap equation, there is a number of
other applications of our fusion matrix approaches. We show some
simple examples to apply our method, such as evaluating
entanglement entropy and out of time ordered correlator.

Hiroshi Isono 
Chulalongkorn University 
Momentum space approach to crossing symmetric conformal correlators 
The crossingsymmetric basis of conformal fourpoint functions, introduced by
Polyakov in 1974, enjoys explicit crossing symmetry while the consistency with
operator product expansion is obscured, offering an alternative approach to
conformal bootstrap. Polyakov originally defined this basis by requiring consistent
factorisation, inspired by the similar property of scattering amplitudes. In this talk,
we revisit Polyakov's original approach and complete the explicit construction of
the crossingsymmetric basis in momentum space, along with our recent findings
about analytic expressions of conformal threepoint functions with spinning
operators in momentum space.

Afternoon Session 1 (14:3015:45) 
ZhanFeng Mai 
Center for Quantum Joint Studies, School of Science Tianjin University 
Holographic OPE Coefficients from AdS Black Holes with Matters 
We study the OPE coefficients $c_{\Delta, J}$ for heavylight
scalar fourpoint functions, which can be obtained
holographically from the twopoint function of a light scalar
of some noninteger conformal dimension $\Delta_L$ in an AdS
black hole. For a pure gravity black hole, we find an
inconsistency, namely $c_{d,0}\neq 0$ in $d>4$. This motivates
us to consider black holes involving matter fields as well. We
first consider general charged AdS black holes and we give some
explicit lowlying examples of the OPE coefficients. We also
obtain the recursion formula for the lowesttwist OPE
coefficients with at most two current operators. For integer
$\Delta_L$, although the OPE coefficients are not fully
determined, we set up a framework to read off the coefficients
$\gamma_{\Delta,J}$ of the $\log(z\bar{z})$ terms that are
associated with the anomalous dimensions of the exchange
operators and obtain a general formula for $\gamma_{\Delta,J}$.
We then consider charged black holes in gauged supergravity STU
models in $D=5$ and $D=7$, and their higherdimensional
generalizations. The scalar fields in the STU models are
conformally massless, dual to light operators with $\Delta_L=d
2$. We obtain the linear perturbation of such a scalar in the
STU charged AdS black holes and obtain the explicit OPE
coefficient $c_{d2,0}$. The inconsistency of $c_{d,0}\ne 0$
however persists in all above examples for $d>4$. Finally, we
analyse the asymptotic properties of scalar hairy AdS black
holes and show how this inconsistency can be resolved in these
backgrounds.

Takahiro Uetoko 
Ritsumeikan University 
Rectangular Walgebras of types so(M) and sp(2M) and dual coset CFTs 
We examine rectangular Walgebras with $so(M)$ or $sp(2M)$ symmetry, which
can be realized as the asymptotic symmetry of higher spin gravities with restricted
matrix extensions. We compute the central charges of the algebras and the levels
of $so(M)$ or $sp(2M)$ affine subalgebras by applying the Hamiltonian
reductions of $so$ or $sp$ type Lie algebras. For simple cases with generators of
spin up to two, we obtain their operator product expansions by requiring the
associativity. We further claim that the Walgebras can be realized as the
symmetry algebras of dual coset CFTs and provide several strong supports.

Takahiro Nishinaka 
Ritsumeikan University 
Peculiar Index Relations, 2D TQFT, and Universality of SUSY Enhancement 
We study a class of 4D N=2 superconformal field theories obtained by exactly
marginal gaugings involving ArgyresDouglas (AD) theories, and show that these
theories are closely related to certain Lagrangian theories of class S. From this
relation, we read off the precise action of Sduality on the flavor symmetry, and
also find expressions for the Schur indices of two infinite series of exotic AD
theories. We then show that, when reduced to 3D, these exotic AD theories can
generically flow to interacting theories with 32 supercharges.

Poster Session 2 (16:0018:30) 
Reona Arai 
Tokyo Institute of Technology 
Superconformal index and supersymmetry enhancement of Sfold theories 
Recently concrete models of 4d $\mathcal{N}=3$ superconformal field theories called Sfold theories are constructed by GarciaEtxebarria and Regalado. Although it is difficult to study these theories due to the lack of the Lagrangian description and the strong coupling, it is expected that there is a nontrivial supersymmetry enhancement for rank one and two theories by Aharony and Tachikawa. In this poster, we evaluate the first nontrivial finite rank corrections to the superconformal index of these theories by using AdS/CFT correspondence and check the supersymmetry enhancement. To evaluate the index in finite rank, we mainly focus on the D3branes wrapping a nontrivial three cycle on AdS side interpreted as Pfaffianlike operators on CFT side. We see that our results agree with the results expected from the supersymmetry enhancement.

Kohta Hatakeyama 
Shizuoka University 
Spacetime structure and the Dirac zero modes from classical
solutions in the Lorentzian type IIB matrix model 
The type IIB matrix model is a conjectured nonperturbative
formulation of superstring theory, and as such it is expected to
explain the origin of spacetime and matter at the same time.
This has been partly demonstrated by the previous Monte Carlo
studies on the Lorentzian version of the model, which suggested
the emergence of (3+1)dimensional expanding universe. Here,
we investigate the same model by solving numerically the
classical equation of motion, which is expected to be valid at late
times since the action becomes large due to the expansion of
space. Many solutions are obtained by the gradient decent
method starting from random matrix configurations assuming a
quasidirectproduct structure for the (3+1) dimensions and the
six extra dimensions. We find that these solutions generally
represent expanding spacetime with smooth structure.
Assuming further some block diagonal structure in the extra
dimensions, we observe emergence of zero modes of the Dirac
operator in (3+1) dimensions as the matrix size is increased.

Tomonori Inoue 
Kobe University 
5d Dirac fermion on quantum graph 
The Standard Model still contains several problems. We introduce extra
dimensions and try to solve the three problems, the generation
problem, the fermion mass hierarchy problem and the origin of the CP
violating phase in the Cabbibo–Kobayashi–Maskawa matrix. We
investigate a 5d Dirac action on a quantum graph, which consists of
bonds and vertices. We take a rose graph, as a quantum graph, which
consists of one vertex and $N$ bonds, where each bond forms a loop
that begins and ends at the vertex. The reason why we consider the
rose graph is that it possesses most general geometry with $N$ bonds
in a single extra dimension. In this talk we show that allowed boundary
conditions (BCs) on the rose graph can be classified into $(2N+1)$
distinct types of BCs and clarify how many massless chiral fermions
appear in the 4d mass spectrum for each type of BCs. The number of
massless chiral fermions is shown to be a topological one and to be
related to a Witten index. This model possesses the desired properties
to solve the above problems.

Shoichi Kawamoto 
Chung Yuan Christian University 
Exploring multipartite steering effect using Bell operators 
EinsteinPodolskyRosen (EPR) steering represents quantum correlation intermediate between entanglement and Bell nonlocality. We evaluate the steering ability of the superposition of two noncommuting Bell operators and explore the strong connection between the EPR steering and joint measurability based on the nonlinear steering inequalities. The necessary and sufficient criteria of unsteerability are investigated and demonstrated in the qutrit case.

Tomomi Kitade 
Nara Women's University 
Sinesquaredeformation as gaugefixing 
Open string field theories expanded around identitybased tachyon vacuum
solutions possess a gauge symmetry of closed string theories. This mechanism is
realized by sinesquaredeformation which has been developed in condensed
matter physics. We show that sinesquaredeformation can be understood as
gaugefixing.

Kazuki Kiyoshige 
Osaka City University 
Selection Rules for Schur Multiplets in 4D N=2
Superconformal Field Theories 
In this study, we calculated the threepoint correlation
functions of the three Schur operators in 4d $\mathcal{N} =
2$ SCFT, and determined the operator product expansion
(OPE). This is a general result of 4d $\mathcal{N} = 2$
SCFT because it is performed using only the symmetry of 4d
$\mathcal{N} = 2$ superconformal algebra. Our computation
leads to more general OPE selection rules which the
currently known. By performing this calculation, it is
expected that the relationship between 4d SCFT / 2d Chiral
algebras can be understood more deeply.

Issei Koga 
Kyushu University 
Catalysis of higher dimensional static black hole in metastable vacuum decay 
Recent studies suggest that our universe exists in the metastable vacuum and may decay. Previous study showed a black hole induces the catalysis for the decay of the metastable vacuum. We want to reveal the catalysis in the superstring theory. As the first step, this work extends the number of dimensions and shows the catalysis of static black holes in 5~10 dimensions.

Pompey Leung 
Waseda University 
Metric Deformations and ZeroMode Wavefunctions on BlowUps of
$\mathbb{C}^n/\mathbb{Z}_n$ Orbifolds 
We explicitly analyse $O(\alpha')$ corrections to heterotic
supergravity on resolutions of toroidal orbifold
singularities. Using a conformal factor ansatz that is valid
only for four dimensional geometries, we numerically
investigate the behaviour around orbifold fixed points by
considering the metric correction on the resolution of a
$\mathbb{C}^2/\mathbb{Z}_2$ singularity. In contrast to the
orbifold limit where the nonstandard embedding scenario
requires the inclusion of fivebranes, a nontrivial
conformal factor can be obtained on the resolution even
without the presence of fivebranes. In the same manner, we
generalise our analysis to study metric corrections on
$T^6/\mathbb{Z}_3$ and its resolution described by a complex
line bundle over $\mathbb{CP}^2$. As a first step towards
studying the effect of such $O(\alpha')$ corrections on
phenomenology, we also studied the wavefunctions of internal
zeromodes on the uncorrected $\mathbb{C}^n/\mathbb{Z}_n$
resolution. Such zeromode wavefunctions are important in
the generating of four dimensional effective Yukawa
couplings in a realistic or semirealistic Standard Model.
Further prospects of including $O(\alpha')$ corrected
metrics in the analysis of internal zeromodes as a novel
approach in obtaining Yukawa couplings are discussed.

Myungbo Shim 
Kyung Hee University 
Analysis of Wrapped branes in 6dimensional Romans gauged
supergravity. 
We explore the spectrum of lowerdimensional antide Sitter
solutions in $F(4)$ gauged supergravity in six dimensions. The
ansatz employed corresponds to D4branes partially wrapped on
various supersymmetric cycles in special holonomy manifolds. Re
visiting and extending the previouis results by M. Naka, in this
article we consider the cases of two, three, and fourdimensional
supersymmetric cycles within CalabiYau threefold, fourfold,
$G_2$ and $Spin(7)$ holonomy manifolds. We also report on non
supersymmetric vacua, and check their stability using the
BreitenlohnerFreedman bound.

Haruya Suzuki 
Ibaraki University 
Cubic interaction vertices of bosonic higher spin fields in
BRSTBV formalism 
Higher spin (HS) gauge theory may be regarded as a
generalization of the electromagnetic theory of a spin1
photon and the linearized gravity of a spin2 graviton.
String theory which has infinitely many massive modes may be
seen as the broken phase of the HS gauge symmetry. Recently
Vasiliev’s HS theory, which is composed of infinitely many
symmetric tensors in AdS4 space, has shed new light on the
AdS/CFT duality. To gain more insight into the duality,
quantization of the theory must be achieved, however the
action for it is not known yet.
In this presentation, we consider cubic interaction vertices
of bosonic HS fields with spin s1, s2 and s3, in flat and AdS
spaces. These vertices are classified as nontrivial elements
of the BRSTBV cohomology.

Mitsuyo Suzuki 
Osaka City University 
On perturbation theory of supersymmetric gradient flow in N = 1 SQCD 
In this poster, I will discuss perturbation theory of supersymmetric gradient flow in
4D N = 1 SQCD. The perturbation theory consists of a perturbative expansion of
4D SQCD and an iterative expansion of the flow equation. A d+1dimensional theory which reproduces the same perturbation series is presented.

Keito Takeuchi 
Kobe University 
KaluzaKlein graviton from primordial nonGaussianities 
Primordial nonGaussianities can be thought of as a high energy particle collider at
the inflation scale, which is typically as high as $10^{14}$GeV. In this presentation,
we explore how to probe KK graviton through the inflaton effective interaction and
the primordial nonGaussianities.

Toshiaki Takeuchi 
Kobe University 
Conformal threepoint functions in momentum space 
We construct threepoint functions with spinning operators in momentum space by explicitly solving the conformal WardTakahashi identities. In particular we demonstrate that they can be obtained by acting some differential operators on scalar threepoint functions. We expect that our results are useful, e.g., for the Polyakov type bootstrap approach and study of cosmological correlation functions. This work is in collaboration with Hiroshi Isono and Toshifumi Noumi.

Pedro Hugo Tanaka 
Kobe University 
Dynamical generation of quark and lepton family structure in an extra dimension 
We will talk about our recent work (arXiv:1905.11597) showing that the observed
quark/lepton mass hierarchy can be realized dynamically on an interval extra
dimension with point interactions, which are pointlike deficits in the bulk space
and provide us extra boundary conditions for fivedimensional fields.
We determined the parameter configuration which describes the value of
quark/lepton mass hierarchy by the minimization of the potential of our model.
We explain how the minimization of the potential determines the positions of the
point interactions, which are ones of the parameters to decide the value of
quark/lepton masses. An additional gaugesinglet scalar (in our scenario) is shown
to be important, whose vacuum expectation value possesses extradimensional
coordinatedependence, and it contributes to the quark/lepton mass hierarchy
crucially.

Taizan Watari 
Kavli IPMU 
Modular forms for arithmetic elliptic curves with complex multiplication seen in string theory perspectives 
It is said, in the field of arithmetic geometry, that a modular form is assigned to a certain class of elliptic curves defined over an algebraic number field. It is natural to wonder if such modular forms have something to do with modular forms that we can define on genusone worldsheet in string theory, and if so, how.
We focus on "elliptic curves of Shimura type", and clarify the relation between the "modular parametrization" in arithmetic geometry and "g=1 chiral correlation functions" in string theory.
This presentation is based on a joint work with Satoshi Kondo.

Shota Yanai 
Tokyo University of Science 
Compact boson stars and charged black holes in the
$CP^{2n+1}$ model 
Qballs are nontopological solitons which appear in certain
nonlinear complex scalar field models. When they couple with
gravity, boson stars arise. We study compact Qballs(shells)
and compact boson stars(shells) in nonlinear sigma model with
$CP^{2n+1}$ target space. We find the new $U(1)$ gauged Q
balls(shells) and their gravitating solutions. We will show
our new solutions and discuss basic properties of our
solutions of charged black holes.

Katsuya Yano 
Osaka City University 
Progress in the matrix model formulation of N = 2 SUSY gauge theories
& Painleve 
We study the $\mathcal{N}=2$ $SU(2)$ supersymmetric gauge
theories by using the matrix model.
In our previous work, we have computed the partition function of the
unitary matrix model which corresponds to the prepotential of the $N_f
= 2$ theory.
In the double scaling limit, we have found that the partition function of
the matrix model obeys the Painleve II equation.
We study the generalization of our previous work by considering the
more general potential and take the double scaling limit for this model.

Mian Zhu 
The Hong Kong University of Science and Technology 
Constructing a Toy Alternative to Inflation Model Using HoravaLifshitz Theory and Euclidean Quantum Gravity 
We work out the scalar perturbation of an toy alternative to inflation model, proposed firstly by $arXiv:1709.07084$ using HoravaLifshitz theory and Euclidean Quantum Gravity approach to solve the flatness problem. We recover the scaleinvariant power spectrum with certain Lifshitz field. This result may motivate an alternative to inflation model for very early universe.

August 23 (Fri) 
Morning Session 1 (9:0010:10) 
Seyed Morteza Hosseini 
Kavli IPMU 
Supersymmetric localization and black holes microstates^{ * } 
I will review recent progresses on deriving the entropy of AdS black holes using supersymmetric localization.

Morning Session 2 (10:3011:45) 
Hyojoong Kim 
Kyung Hee University 
Black holes with baryonic charge and Iextremization 
Recently it was discovered that twisted superconformal index ${\mathcal{I}}$ can
be used to understand the BekensteinHawking entropy of magnetically charged
black holes in AdS spacetime. We apply the socalled $\mathcal{I}$extremization
procedure to threedimensional gauge field theories and their geometric dual,
focusing in particular on the sevendimensional SasakiEinstein manifold
$M^{1,1,1}$. We generalize recent studies on relations among toric geometry,
variational principles, and black hole entropy to the case of AdS$_2 \times Y_9$,
where $Y_9$ is a fibration of toric SasakiEinstein manifold $M^{1,1,1}$ over a two
dimensional Riemann surface $\Sigma_g$. The ninedimensional variational
problem is given in terms of an entropy functional. In order to illustrate the
computations as explicitly as possible, we consider cases where either only
mesonic or baryonic fluxes are turned on.
By employing the operator counting method, we calculate the $S^3$ free energy
and the topologically twisted index $\mathcal{I}$ at large$N$. The result for
$\mathcal{I}$, it turns out, can be also obtained from the variational principle of
the entropy functional with mesonic fluxes. We also study asymptotically
AdS${}_4$ black holes which are magnetically charged with
respect to the vector field in the Betti multiplet. By extremizing the entropy
functional with baryonic flux, we compute the entropy and find that it agrees with
the entropy of an explicit solution in a fourdimensional gauged supergravity which
is a consistent truncation of elevendimensional supergravity in AdS${}_4\times
M^{1,1,1}$.

Shota Fujiwara 
Tokyo Institute of Technology 
D3brane analysis for the superconformal index in AdS$_5$/CFT$_4$ 
We study the AdS$_5$/CFT$_4$ correspondence for ﬁnite $N$ by using the superconformal index.
Especially, we calculate the ﬁnite $N$ corrections to the superconformal index from the dual gravity theory.
Our method is based on the assumption that D3branes wrapped around threecycles in the internal space reproduce the ﬁnite $N$ corrections.
A recent work by Arai and Imamura showed that this method gives nontrivial predictions for Sfold theories.
We further find this approach actually gives the known superconformal index (localization result) for leading corrections for orbifold quiver gauge theories.

Yiwen Pan 
Sun Yatsen University 
Localizing Schur correlation functions 
Schur operators in a 4d $\mathcal{N}$=2 theory form a chiral algebra
under OPE, and they are counted by the Schur index which can be
identified with the vacuum character of the associated chiral algebra. We
derive such identification via localization on $S^3 \times S^1$. Further
more, by generalizing the wellknown localization argument, we show that
all Schur operators, though being nonBPS, can be localized. The matrix
integral computing the exact Schur correlation function is given. By
introducing surface defects, characters of nonvacuum module can also
be accessed via localization.

Morning Session 3 (12:0013:40) 
Naotaka Kubo 
Yukawa Institute for Theoretical Physics 
HananyWitten Transition in Quantum Curves 
It was known that the $\mathrm{U}(N)^4$ super ChernSimons matrix
model describing the worldvolume theory of D3branes with two
NS5branes and two $(1,k)$5branes in IIB brane configuration
(dual to M2branes after taking the Tduality and the Mtheory
lift) corresponds to the quantum curve which has $D_5$ symmetry.
We study the correspondence in detail and, by matching the two
sides, we find a relation between the $D_5$ symmetry and the
symmetries of branes such as HananyWitten transition. This
provides a new viewpoint for brane symmetries.

Yuji Sugimoto 
University of Science and Technology of China 
Quantum Mirror Map for Del Pezzo Geometries 
It was known that algebraic curves of genus one (called Del
Pezzo geometries), which control M2brane
physics or fivedimensional gauge theories, are classified by the
Weyl group of exceptional algebras. From this
viewpoint, it is expected that the large Weyl group would be
helpful for clarifying the structure of physical
quantities. In this talk, we study the quantum mirror map of the
D5 Del Pezzo geometry from the period
integrals. We reproduce correctly the grouptheoretical structure
and the multicovering structure with the
following two interesting observations:
(1) The representations appearing in the quantum mirror map are
almost the same as those appear in the BPS
indices.
(2) Unlike the BPS indices, the decomposition into
representations does not enjoy exact positivity, though the
exceptions are only a few.

Hirotaka Hayashi 
Tokai University 
Wallcrossing and operator ordering for 't Hooft operators
in N=2 gauge theories 
We study halfBPS 't Hooft line operators in 4d N=2
$U(N)$ gauge theories on $S^1 \times \mathbb{R}^3$ with
an $\Omega$deformation. The recently proposed brane
construction of 't Hooft operators shows that non
perturbative contributions to their correlator are
identified with the Witten indices of quiver
supersymmetric quantum mechanics. For the products of
minimal 't Hooft operators, a chamber in the space of
FayetIliopoulos parameters in the quantum mechanics
corresponds to an ordering of the operators inserted
along a line. These considerations lead us to conjecture
that the Witten indices can be read off from the Moyal
products of the expectation values of the minimal 't
Hooft operators, and also that wallcrossing occurs in
the quantum mechanics only when the ordering of the
operators changes. We provide evidence for the
conjectures by explicitly computing the Witten indices
for the products of two and three minimal 't Hooft
operators in all possible chambers.

Naoki Yamatsu 
Kyoto University 
Is Symmetry Breaking into Special Subgroup Special? 
Recently, I have proposed newtype grand unified theories (GUTs) ``Special GUTs.'' In this framework, the GUT gauge groups must be broken to their special subgroups. Many people seem to believe that symmetry groups are broken to regular subgroups, not to special subgroups. In this talk, I will show that the symmetry breaking into special subgroups is not special, by using dynamical symmetry breaking pattern in 4D SU(N) NambuJonaLasino type models. This talk is based on arXiv:1904.06857 with T. Kugo.
