# Outline of Project D01

## Quantum information theoretic approach to the dynamics of quantum field theory (21H05190)

Many of the phenomena around us, such as the Standard Model of elementary particles, are described in terms of quantum field theory. Understanding the physics of the microscopic realm is important not only for investigating the ultimate constituents of matter, but also for exploring the nature of quantum many-body systems, in which many fundamental quantum systems cooperate with each other to create new physical phenomena. The goal of group D01 is to elucidate the dynamics of matter that exhibits such quantum behavior. In quantum information theory, how quantum systems change under various physical manipulations is investigated from a general viewpoint. By adopting the perspective of quantum information theory, new aspects of quantum field theory may be revealed that cannot be understood by conventional methods. In particular, by focusing on the common mathematical structure behind quantum field theory and quantum information theory, we hope to uncover universal properties that all field quantum theories should possess, independent of individual quantum systems. As a complementary approach to examining the dynamics of quantum field theories, we will perform quantum computer simulations of quantum field theories. Many physical systems, including finite density systems and real time systems, are difficult to simulate on classical computers, but are expected to be efficiently simulated on quantum computers. By developing and implementing methods of quantum computation suitable for quantum field theory, we will be able to elucidate important phenomena such as the scattering process of elementary particles and the evaporation process of black holes. Furthermore, we will explore the relationship between the quantum information theory aspect of quantum field theory and holographic principles as well as quantum gravity theory.

### Members in D01

**[Principal Investigator]**

Tatsuma Nishioka Department of Physics, Osaka university

**[Co-Investigator]**

Masazumi Honda RIKEN, iTHEMS

Etsuko Itou Yukawa Institute for Theoretical Physics, Kyoto University

Yutaka Matsuo Department of Physics, The University of Tokyo

Takuya Okuda Graduate School of Arts and Sciences, The University of Tokyo

**[ExU Postdoctoral Fellows(Research Collaborators)]
**Pratik Nandy Yukawa Institute for Theoretical Physics, Kyoto University

Dongsheng Ge Department of Physics, Osaka University

**[Research Collaborators]**

Takahiro Doi Research Center for Nuclear Physics, Osaka University

Kazunobu Maruyoshi Faculty of Science and Technology, General Education, Seikei University

Lento Nagano International Center for Elementary Particle Physics, The University of Tokyo

Ryo Suzuki Shing Tung Yau Center of Southeast University

Hiroyuki Tajima Department of Physics, The University of Tokyo

Shouichiro Tsutsui iTHEMS, RIKEN

Masahito Yamazaki Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo

Yutaka Yoshida Faculty of Law, Meiji Gakuin University

Akira Matsumoto iTHEMS, RIKEN

**[Graduate Students]**

Hiroki Sukeno Stony Book University

Yoshitaka Okuyama Department of Physics, The University of Tokyo

Kohki Kawabata Department of Physics, The University of Tokyo

Shinichiro Yahagi Department of Physics, The University of Tokyo

Taichi Nakanishi Yukawa Institute for Theoretical Physics, Kyoto University

Soichiro Shimamori Department of Physics, Osaka University

Harunobu Fujimura Department of Physics, Osaka University

Takahiro Tanaka Yukawa Institute for Theoretical Physics, Kyoto University

Rumi Hasegawa Graduate School of Science and Technology, Niigata University

**[Past Members]**

Naohisa Sueishi Keio University

Daisuke Inotani The Research and Education Center for Natural Sciences, Keio University