{"id":540,"date":"2021-11-10T13:51:52","date_gmt":"2021-11-10T04:51:52","guid":{"rendered":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/?p=540"},"modified":"2025-04-01T11:04:32","modified_gmt":"2025-04-01T02:04:32","slug":"outline-of-project-c03","status":"publish","type":"post","link":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/en\/outline-of-project-c03\/","title":{"rendered":"Outline of Project C03"},"content":{"rendered":"

Gravitation and cosmology: principles and applications based on quantum information (21H05189)<\/h2>\n
\n
Principal Investigator: Tetsuya Shiromizu<\/div>\n
\"\"<\/div>\n<\/div>\n

General Relativity proposed by A. Einstein is the most convincing classical theory of gravity describing the dynamical fluctuations of space and time. Cosmological models based on General Relativity have successfully explained a bunch of phenomena observed in the Universe. Nevertheless, some fundamental issues remain long-standing puzzles. Of most prominence is the origin of the two phases of the accelerated expansion of the early and late universe, a.k.a. inflation and dark energy. This exposes a lack of our profound understanding of gravity and spacetime. In this project, we therefore aim to clarify the whole consistent picture of gravity and spacetime, which would make progress toward resolution of the beginning and the accelerated expansion of the Universe.
\nThe research proposal of our group (C3) is two-fold: one is to incorporate the aspects of quantum information\u2014which has been substantially developed during the past decade by the Ryu-Takayanagi formula in the gauge\/gravity correspondence\u2014into \u201cbraneworld.\u201d A braneworld describes our 4-dimensional universe as a thin membrane corresponding to the boundary of higher dimensional anti-de Sitter spacetime. This model has been motivated by and consistently derived from particle physics. We try to reframe the braneworld model from the perspective of quantum information theory. It is our hope that this new braneworld perspective would be a powerful tool and provide a clue to get deeper insight into problems of universe.
\nAnother blueprint of our research proposals is to identify the direct signature of quantum gravity by exploring a broad range of topics on gravitational physics. The recent experimental activities including the detection of gravitational wave signals and the image of supermassive black holes have reached a sensitivity where the deviation from General Relativity is testable. Stimulated by this new exciting window of opportunity in cosmology\/astrophysics, we address phenomena that lead to the robust predictions of quantum aspects of gravity.<\/p>\n

\"\"<\/p>\n

Members in C03<\/h3>\n

[Principal Investigator]<\/strong>
\nTetsuya Shiromizu<\/a> Graduate School of Mathematics, Nagoya University<\/p>\n

[Co-Investigator]<\/strong>
\nKeisuke Izumi<\/a> Graduate School of Mathematics, Nagoya University
\nTsutomu Kobayashi<\/a> Department of Physics, Rikkyo University
\nMasato Nozawa<\/a> Faculty of Engineering, Osaka Institute of Technology
\nNorihiro Tanahashi<\/a> Graduate School of Science, Kyoto University
\nHirotaka Yoshino<\/a> Graduate School of Science, Osaka Metropolitan University<\/p>\n

[ExU Postdoctoral Fellows(Research Collaborators)]
\n<\/strong>Daisuke Yoshida Graduate School of Mathematics, Nagoya University<\/p>\n

[Research Collaborators]<\/strong>
\nSumio Yamada Faculty of Science, Gakushuin University<\/p>\n

[Graduate Students]<\/strong>
\nKensuke Sueto Graduate School of Science, Osaka Metropolitan University
\nStig Lundgren Graduate School of Mathematics, Nagoya University\n<\/p>\n

[Past Members]
\n<\/strong>Shunichiro Kinoshita Chuo University
\nNorichika Sago<\/a> Kyoto University \/ Osaka Metropolitan University
\nDiego Soligon Graduate School of Mathematics, Nagoya University
\nLei Fu Graduate School of Mathematics, Nagoya University
\nMasaya Amo Yukawa Institute for Theoretical Physics, Kyoto University<\/p>\n","protected":false},"excerpt":{"rendered":"

Gravitation and cosmology: principles and applications based on quantum information (21H05189) Principal Inves […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[37],"tags":[],"class_list":["post-540","post","type-post","status-publish","format-standard","hentry","category-organization"],"acf":[],"_links":{"self":[{"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/posts\/540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/comments?post=540"}],"version-history":[{"count":21,"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/posts\/540\/revisions"}],"predecessor-version":[{"id":5368,"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/posts\/540\/revisions\/5368"}],"wp:attachment":[{"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/media?parent=540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/categories?post=540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www2.yukawa.kyoto-u.ac.jp\/~extremeuniverse\/wp-json\/wp\/v2\/tags?post=540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}