Quantum Gravity & Holography Sogang University · Department of Physics · Center for Quantum Spacetime (CQUeST)

Reading quantum gravity off its boundary

What we work on

Quantum gravity & string theory

Quantum gravity explores gravitational physics at length scales where quantum effects become significant — a regime that neither general relativity nor quantum field theory describes on its own. String theory is currently the most promising candidate for such a theory, so understanding its physical implications is the starting point of our work.

Holographic duality

Holography states that a string theory on a (d+1)-dimensional anti-de Sitter space, together with a (9−d)-dimensional internal manifold, is equivalent to a d-dimensional conformal field theory living on the conformal boundary — the AdS/CFT correspondence. It gives one of the most concrete routes to string theory as a theory of quantum gravity: the physics of strings in AdS can be read off from the dual CFT.

Recent work

Boundary-value problem in type IIB supergravity and holography
Soumya Adhikari, Junho Hong, Chanyoung Joung, Geum Lee, Sourav Roychowdhury
Preprint
Constants in sequences of M2-brane partition functions
Junho Hong
Preprint
Towards OSV in AdS
Nikolay Bobev, Sunjin Choi, Junho Hong, Valentin Reys
JHEP 09 (2026) 076
Type IIB supergravity action and holography
Soumya Adhikari, Junho Hong, Chanyoung Joung, Geum Lee
JHEP 06 (2026) 271