3 citations · 7 across the 6 of their papers we have counts for
6 papers
Are wormholes generic with large sources?
Xiaoyi Liu, Donald Marolf, Jorge E. Santos
Euclidean path integrals can be used to prepare states of a Lorentzian QFT. So long as any sources are turned off on the surface, the resulting Lorentzian states all belong t…
Ill-posedness of the Cauchy problem for linearized gravity in a cavity with conformal boundary conditions
Xiaoyi Liu, Harvey S. Reall, Jorge E. Santos +1
We consider Lorentzian General Relativity in a cavity with a timelike boundary, with conformal boundary conditions and also a generalization of these boundary conditions. We focus…
Euclidean and complex geometries from real-time computations of gravitational Rényi entropies
Jesse Held, Xiaoyi Liu, Donald Marolf +1
Gravitational Rényi computations have traditionally been described in the language of Euclidean path integrals. In the semiclassical limit, such calculations are governed by Euclid…
Null states and time evolution in a toy model of black hole dynamics
Xi Dong, Maciej Kolanowski, Xiaoyi Liu +2
Spacetime wormholes can provide non-perturbative contributions to the gravitational path integral that make the actual number of states in a gravitational system much smaller…
New Well-Posed Boundary Conditions for Semi-Classical Euclidean Gravity
Xiaoyi Liu, Jorge E. Santos, Toby Wiseman
We consider four-dimensional Euclidean gravity in a finite cavity. Dirichlet conditions do not yield a well-posed elliptic system, and Anderson has suggested boundary conditions th…
Stability of saddles and choices of contour in the Euclidean path integral for linearized gravity: Dependence on the DeWitt Parameter
Xiaoyi Liu, Donald Marolf, Jorge E. Santos
Due to the conformal factor problem, the definition of the Euclidean gravitational path integral requires a non-trivial choice of contour. The present work examines a generalizatio…