Outline of Project C02

Quantum cosmology experiments in quantum Hall systems (21H05188)

Principal Investigator: Go Yusa

How did our universe develop from its earliest moments? This is the major question of quantum cosmology, and to answer it great efforts have been made both in theory and in attempts to verify theory by observation of cosmic background radiation. It would be ideal if we could reproduce the origin and evolution of the universe in a laboratory and thereby experimentally verify the theory by controlling key parameters. Therefore, in this research project we aim at implementing quantum cosmology in the laboratory in a toy model which is a theoretically equivalent physical system to the early universe. In this way we seek to provide a rich playground for verification of quantum cosmology theory.
The actual physical system that we deal with comprises electrons in semiconductors. Semiconductor industry consists of state-of¬-the-art modern technologies such as ultra-high quality crystal growth technology, fine process technology, and electronics. In this project, using such mature technologies as a base, we implement toy models of quantum cosmology on a semiconductor chip using quantum Hall edges, which are an intriguing quantum many-body system. Through experiment and theory, we aim at unveiling the mechanism of the origin of the universe. More specifically, (1) we will establish advanced quantum measurement techniques and perform experiments on quantum Hall edges, and (2) examine quantum cosmology by collaborating with various fields of researchers from particle theory, mathematical physics, solid-state theory, quantum information, and cosmology

Members in C02

[Principal Investigator]
Go Yusa Department of Physics, Tohoku University

[Co-Investigator]
Naokazu Shibata Department of Physics, Tohoku University
Masahiro Hotta Department of Physics, Tohoku University
Kazuya Yonekura Department of Physics, Tohoku University

[Research Collaborators]
Takaaki Mano National Institute for Materials Science
Kazuhiro Yamamoto Department of Physics, Kyushu University
Yasusada Nanbu Department of Physics, Nagoya University
Chisa Hotta Graduate School of Arts and Sciences, University of Tokyo
Kazunori Nakayama Department of Physics, Tohoku University
Vladimir Umansky Weizmann Institute of Science
Koji Yamaguchi University of Waterloo
Kenichi Sasaki NTT Basic Research Laboratories
Kento Watanabe Department of Physics, Tohoku University

[Students]
Jun Tsujimura Department of Physics, Nagoya University
Yuki Sugiyama Department of Physics, Kyushu University
Yuka Kaku Department of Physics, Nagoya University
Yasuaki Hayafuchi Department of Physics, Tohoku University
Ryota Konno Department of Physics, Tohoku University
Reiji Kawada Department of Physics, Tohoku University
Yuki Osawa Department of Physics, Nagoya University
Donghyeon Kim Department of Physics, Tohoku University
Yunhyon Jeong Department of Physics, Tohoku University
Shun Kobayashi Department of Physics, Tohoku University
Takahiro Yokokura Department of Physics, Tohoku University
Kazunori Akiyama Department of Physics, Tohoku University
Ayaka Kondo Department of Physics, Tohoku University
Kairi Kaneta Department of Physics, Tohoku University
Yutaro Takahashi Department of Physics, Tohoku University
Felix Borchers Heidelberg University

[Past Members]
Akinori Kamiyama Department of Physics, Tohoku University
Ikuya Marumoto Department of Physics, Tohoku University
John Nicholas Moore Department of Physics, Tohoku University