# Multiverse in an inverted island

@article{Langhoff2021MultiverseIA, title={Multiverse in an inverted island}, author={Kevin Langhoff and Chitraang Murdia and Yasunori Nomura}, journal={Physical Review D}, year={2021} }

Kevin Langhoff, Chitraang Murdia, and Yasunori Nomura 2, 3 Berkeley Center for Theoretical Physics, Department of Physics, University of California, Berkeley, CA 94720, USA Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, Kashiwa 277-8583, Japan

#### 7 Citations

Islands in multiverse models

- Physics
- Journal of High Energy Physics
- 2021

Abstract
We consider multiverse models in two-dimensional linear dilaton-gravity theories as toy models of false vacuum eternal inflation. Coupling conformal matter we calculate the Von Neumann… Expand

Free fermion entanglement with a semitransparent interface: the effect of graybody factors on entanglement islands

- Physics
- SciPost Physics
- 2021

We study the entanglement entropy of free fermions in 2d in the
presence of a partially transmitting interface that splits Minkowski
space into two half-spaces. We focus on the case of a single… Expand

Island for Gravitationally Prepared State and Pseudo Entanglement Wedge

- Physics
- 2021

We consider spacetime initiated by a finite-sized initial boundary as a generalization of the Hartle-Hawking no-boundary state. We study entanglement entropy of matter state prepared by such… Expand

Entanglement between two evaporating black holes

- Physics
- 2021

We study a thermo-field double type entangle state on two disjoint gravitating universes, say A and B, with an eternal black hole on each. As was shown previously, its entanglement entropy of the… Expand

A comment on a fine-grained description of evaporating black holes with baby universes

- Physics
- 2021

We study a partially fine-grained description of an evaporating black hole by introducing an open baby universe with a boundary. Since the Page’s calculation of the entropy of Hawking radiation… Expand

Entanglement of Initial State and Pseudo Entanglement Wedge

- 2021

We consider spacetime initiated by a finite-sized boundary on which a pure initial matter state is set as a natural generalization of the Hartle-Hawking noboundary state. We study entanglement… Expand

Cosmologies, singularities and quantum extremal surfaces

- Physics
- 2021

Following arXiv:2012.07351 [hep-th], we study quantum extremal surfaces in various families of cosmologies with Big-Crunch singularities, by extremizing the generalized entropy in 2-dimensional… Expand

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