Plenary Lecture

2021 KPS Fall Meeting   October 20-22, 2021   Virtual Conference

”Constraints on Quantum Gravity”


Prof. Hirosi Ooguri

Director and Fred Kavli Professor
Walter Burke Institute for Theoretical Physics
California Institute of Technology

Kavli Institute for the Physics and Mathematics of the Universe
University of Tokyo

Chair of Board of Trustees
Aspen Center for Physics


TIME: October 20 (Wed.) 11:00-12:00


Although predictions of quantum gravity are typically at extremely high energy, several non-trivial constraints on its low energy effective theory have been found over the last decade or so. I will start by explaining why the unification of general relativity and quantum mechanics has been difficult. After introducing the holographic principle as our guide to the unification, I will discuss its use in finding constraints on symmetry in quantum gravity. I will also discuss other conjectural constraints on low energy effective theories, collectively called swampland conditions, and their consequences.




Doctor of Science, University of Tokyo, 1989
Master of Science, Kyoto University, 1986
Bachelor of Science, Kyoto University, 1984



Positions at the California Institute of Technology:

Fred Kavli Professor of Theoretical Physics and Mathematics, 2007-present
Founding Director of the Walter Burke Institute for Theoretical Physics, 2014-present
Deputy Chair of the Division of Physics, Mathematics and Astronomy, 2010-2015
Professor of Theoretical Physics and Mathematics, 2000-2007

Positions at Other Institutions:

Director of the Kavli IPMU, University of Tokyo, 2018-present
Professor, University of California, Berkeley, 1994-2000
Faculty Senior Scientist, Lawrence Berkeley National Laboratory, 1996-2000
Associate Professor, Kyoto University, 1990-1996
Assistant Professor, University of Chicago, 1989-1990
Member of the School of Natural Sciences, Institute for Advanced Study, Princeton, 1988-1989
Assistant Professor, University of Tokyo, 1986-1989


Benjamin Lee Professor, APCTP, 2021
Medal of Honor with Purple Ribbon, Emperor of Japan, 2019
Nishina Memorial Lecture, Nishina Memorial Foundation, Denmark, 2019
Hamburg Prize, Joachim Herz Foundation, 2018
Fellow, American Academy of Arts and Sciences, 2016
Chunichi Cultural Prize, Chunichi Shimbun, 2016
Best Educational Product Award, International Planetarium Society, 2016
Kodansha Prize for Science Books, Kodansha, 2014
Fellow, American Mathematical Society, 2012
Simons Investigator, Simons Foundation, 2012
Nishina Memorial Prize, Nishina Memorial Foundation, 2009
Takagi Lecturer, Mathematical Society of Japan, 2009
Humboldt Research Award, Alexander von Humboldt Foundation, 2008
Eisenbud Prize for Mathematics and Physics, American Mathematical Society, 2008


President, Aspen Center for Physics, 2016-2019
Trustee, Aspen Center for Physics, 2011-2016
Scientific Secretary, Aspen Center for Physics, 2010-2011
Member, Aspen Center for Physics, 2003-present
Principal Investigator, Kavli IPMU, University of Tokyo, 2007-2018