9 papers
Ramp, Plateau, and Wormholes without Averaging, and Hyper-non-perturbative Structures in Gravity
Hong Liu
Universal hallmarks of quantum chaos---such as the ramp and plateau in the spectral form factor---and the ramp's gravitational duals involving wormholes are widely interpreted as c…
Breaking the degeneracy among regular black holes with gravitational lensing
Hong Liu, Xiaolong Liao, Yi Zhang
We examine parameter degeneracies in Culetu, Bardeen and Hayward regular black holes across lensing, shadow and quasinormal mode regimes. Our analysis reveals that while Einstein r…
Probing Stringy Horizons with Pole-Skipping in Non-Maximal Chaotic Systems
Ping Gao, Hong Liu
In this paper, we study pole-skipping in non-maximally quantum chaotic systems. Using Rindler conformal field theories and the large- SYK chain as illustrative examples, we argu…
"Filtering" CFTs at large N: Euclidean Wormholes, Closed Universes, and Black Hole Interiors
Hong Liu
Despite its successes, the large- holographic dictionary remains incomplete. Key features of gravitational path integrals--most notably Euclidean wormholes and the associated fa…
Lectures on entanglement, von Neumann algebras, and emergence of spacetime
Hong Liu
We review recent developments in the use of von Neumann algebras to analyze the entanglement structure of quantum gravity and the emergence of spacetime in the semi-classical limit…
Towards a holographic description of closed universes
Hong Liu
We study baby closed universes in AdS, focusing on the Antonini-Sasieta-Swingle (AS) cosmology, which arises in the gravitational description of partially entangled thermal sta…