This is the third school supported by the Grant-in Aid for Transformative Research Areas (A) "Extreme Universe" (Sep. 2021 - Mar. 2026), a project aiming to elucidate the "extreme universe" from the new perspective that all things are composed of "quantum information", going beyond the conventional understanding of "time, space, and matter" in physics. This "extreme universe" refers to the extreme conditions of the natural world, and includes the following three targets: (i) quantum theory of Black holes (i.e. the limit of space), (ii) quantum theory of Cosmology (i.e. the limit of time), and (iii) Dynamics of quantum matter (i.e. the limit of matter). To facilitate collaboration among researchers, including graduate students, from different research backgrounds, we host lectures by multiple leading researchers from related fields. After two schools in March and July 2022 in the Japanese language, in the third school all lectures will be given in English.


Eight 90-minute lectures (+ 30-minute Q&A session) will be given between
Monday, 13 February and Friday, 17 February 2023.

On-site attendance at Nagoya University will be limited to the on-site participants of the Young Researchers' workshop (YRW), limited to ExU members and their collaborators.
Lecture times are in JST (UTC+9).

13 Feb.
14 Feb.
15 Feb.
16 Feb.
17 Feb.
8:45 - 10:45 Fukuhara (YRW Free Discussion 1) Le Gall Yokoyama
11:00 - 12:30 (YRW Session 2) break (YRW Session 6) (YRW Free Discussion 2)
12:30 - 14:00 Opening (from 13:45) break Le Gall (until 14:30) break break
14:00 - 16:00 Fukuhara Le Gall (YRW Session 4) (after 14:30) Yokoyama Yokoyama
16:15 - 18:00 (YRW Session 1) (YRW Session 3) (YRW Session 5) (YRW Session 7) Tadashi Takayanagi (Head investigator of the ExU Collaboration): Closing (just after the previous lecture) (online)


    • Takeshi Fukuhara (RIKEN): "Experimental study of quantum many-body systems with ultracold atoms" (Two lectures)
      Abstract: Ultracold atoms in optical lattices allow us to prepare highly controllable artificial quantum systems, which are an ideal platform to study quantum many-body problems. In this lecture, I will introduce optical lattice experiments and review what have been done so far. Especially I will focus on experiments on non-equilibrium dynamics of quantum many-body systems.
    • François Le Gall (Nagoya Univ.): "Introduction to Quantum Algorithms" (Three lectures)
      Abstract: I will give an introduction to quantum computing and quantum algorithms. I will start with basic concepts such as superposition and entanglement, and then discuss the quantum circuit model of computation. I will finally present basic quantum algorithms that demonstrate the power of computing with quantum bits, such as Deutsch–Jozsa algorithm and Grover algorithm.
    • Shuichiro Yokoyama (Nagoya Univ.): "Standard inflationary cosmology" (Three lectures)
      Abstract: In this lecture, I will first give a review of the standard big bang model, that is, the expanding Universe, and sort out some issues related to the initial conditions in this model. From the perspective of solving/relaxing the initial condition problem, I will explain the basic idea of "inflation", and then, as the simplest standard model, "slow-roll" inflation with a scalar field is introduced. Finally, I will discuss the generation and evolution of cosmological primordial fluctuations during the inflationary era. If I have time, I would also like to show the current status of the observational constraint on the slow-roll models.


Use the Registration form to attend online by Saturday, 11 February 2023.


Keisuke Izumi (Nagoya Univ.), Tomonori Ugajin (YITP, Kyoto Univ.), Koichi Okunishi (Niigata Univ.), Tadashi Takayanagi (YITP, Kyoto Univ.), Masaki Tezuka (Dept. of Phys., Kyoto Univ.), Yoshifumi Nakata (YITP, Kyoto Univ.), Masazumi Honda (YITP, Kyoto Univ.), Keiju Murata (Nihon Univ.), Daisuke Yamamoto (Nihon Univ.), Go Yusa (Tohoku Univ.)


Inquiries on the Extreme Universe School should be addressed to tezuka at .