One-day workshop
August 30, 2013


Program Participants Back to HP

09:30 - 10:00 Coffee Break


10:00 - 11:00 Martin Bucher         ``Results from Planck : What is interesting ?''
In March 2013 the Planck collaboration released 29 papers on the first cosmological results based on the temperature data. On the one hand the results seem to confirm a very simple picture of the early universe. However, there are some anomalies present in the data. In this talk I intend to take stock of the situation indicating the implications for theory.
Talk Slide
11:00 - 11:35 Takahiro Tanaka         ``Comment on making statistical dipole anisotropies''
I'll briefly comment on how to make statistical dipole anisotropies
Talk Slide
11:35 - 11:10 Chiaki Hikage         ``Primodial non-Gaussianity from Isocurvature Perturbations''
I will present the effect of primordial isocurvature perturbations on the non-Gaussian properties in CMB and the recent results of their observational constraints.
Talk Slide


12:10 - 13:40 Lunch


13:40 - 14:15 Jonathan White         ``Curvature perturbation in multi-field inflation models with non-minimal coupling''
Using the N formalism we consider the non-linear curvature perturbation resulting from multi-field inflation models in which potentially all fields are non-minimally coupled to the Ricci Scalar. We first clarify the relationship between the curvature perturbations in the Jordan and Einstein frames, confirming their equivalence in the case that an adiabatic limit is reached. We then consider two analytically soluble examples and compare their predictions with the recent Planck results.
Talk Slide
14:15 - 14:50 Dong-han Yoem         ``No-boundary proposal toward good inflation models"
There are many inflation models/hypothesis. If we know the correct theory of quantum gravity/cosmology, then this can be used to find a good hypothesis of inflation. In this presentation, I will use the no-boundary proposal to judge a certain inflation model, whether it is good or not in the point of view of probability. There are three ways to make a good inflation hypothesis: the first inflation happened at the high energy scale, the inflation potential is finely tuned, or there should be an additional factor that is different from Einstein gravity. I will illustrate some useful examples.
Talk Slide
14:50 - 15:25 Ying-li Zhang         ``Hawking-Moss and Coleman-de Luccia instantons in dRGT massive gravity"
TBA
Talk Slide


15:25 - 15:55 Coffee Break


15:55 - 16:30 Toshiya Namikawa         ``Measuring Lensing Effect on temperature and polarizations''
I discuss methods to measure lensing effect on CMB. I particularly focus on the lensing reconstruction in the presence of several possible sources which would bias the lensing potentials and its power spectrum estimates.
Talk Slide
16:30 - 17:05 Atsushi Taruya         "Confronting Planck cosmology with large-scale structure observations"
The Planck cosmology results favor a smaller value of Hubble parameter and a larger value of Omega_m than those of the WMAP results. I will discuss the consistency of these results with large-scale structure observations, mainly focusing on the measurements of anisotropic galaxy clustering.
Talk Slide
17:05 - 18:05 Masashi Hazumi         ``The LiteBIRD satellite project''
After some introduction to current and near-future CMB polarization measurements, I will describe the LiteBIRD satellite project and explain the pass toward r = 0.001 with precision measurements of CMB polarization.
Talk Slide


18:30 - Conference Dinner