67 citations · 379 across the 21 of their papers we have counts for
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Quantum State of a Gravitating Spacetime Region
Raphael Bousso, Sami Kaya, Guanda Lin +1
We associate a gravitational Hilbert space to any closed compact -manifold with real metric. A quantum state is a -manifold bounded by…
Quantum State of a Gravitating Region
Raphael Bousso, Sami Kaya, Guanda Lin +1
We propose that any compact -manifold with elliptic data, , prepares a quantum state on its -boundary . Elliptic data consists of me…
Consistent Evaluation of the No-Boundary Proposal
Ahmed I. Abdalla, Stefano Antonini, Raphael Bousso +3
We revisit the Hartle-Hawking no-boundary proposal. To extract probabilities, one must use the gravitational path integral (GPI) to compute not only the no-boundary amplitude, but…
Constraints on the resolution of spacetime singularities
Arvin Shahbazi-Moghaddam
What happens at spacetime singularities is poorly understood. The Penrose-Wall singularity theorem constrains possible scenarios, but until recently its key assumption--the general…
Tests of restricted Quantum Focusing and a new CFT bound
Victor Franken, Sami Kaya, François Rondeau +2
The restricted quantum focusing conjecture (rQFC) plays a central role in an axiomatic formulation of semiclassical gravity. Since much hinges on its validity, it is imperative to…
The Structure of Quantum Singularities on a Cauchy Horizon
Arvin Shahbazi-Moghaddam
Spacetime singularities pose a long-standing puzzle in quantum gravity. Unlike Schwarzschild, a generic family of black holes gives rise to a Cauchy horizon on which, even in the H…
Twice Upon a Time: Timelike-Separated Quantum Extremal Surfaces
Netta Engelhardt, Geoff Penington, Arvin Shahbazi-Moghaddam
The Python's Lunch conjecture for the complexity of bulk reconstruction involves two types of nonminimal quantum extremal surfaces (QESs): bulges and throats, which differ by their…
Restricted Quantum Focusing
Arvin Shahbazi-Moghaddam
Quantum Focusing is a powerful conjecture, which plays a key role in the current proofs of many well-known quantum gravity theorems, including various consistency conditions, and c…
Quantum Singularities
Raphael Bousso, Arvin Shahbazi-Moghaddam
Two spatial regions and are hyperentangled if the generalized entropy satisfies . If in addition all future (or all past) directe…
Singularities From Entropy
Raphael Bousso, Arvin Shahbazi-Moghaddam
Assuming the Bousso bound, we prove a singularity theorem: if the light rays entering a hyperentropic region contract, then at least one light ray must be incomplete. "Hyperentropi…
Finding Pythons in Unexpected Places
Netta Engelhardt, Geoff Penington, Arvin Shahbazi-Moghaddam
We argue that novel (highly nonclassical) quantum extremal surfaces play a crucial role in reconstructing the black hole interior even for isolated, single-sided, non-evaporating b…
A World without Pythons would be so Simple
Netta Engelhardt, Geoff Penington, Arvin Shahbazi-Moghaddam
We show that bulk operators lying between the outermost extremal surface and the asymptotic boundary admit a simple boundary reconstruction in the classical limit. This is the conv…
Island Finder and Entropy Bound
Raphael Bousso, Arvin Shahbazi-Moghaddam
Identifying an entanglement island requires exquisite control over the entropy of quantum fields, which is available only in toy models. Here we present a set of sufficient conditi…
Seeing the Entanglement Wedge
Adam Levine, Arvin Shahbazi-Moghaddam, Ronak M Soni
We study the problem of revealing the entanglement wedge using simple operations. We ask what operation a semiclassical observer can do to bring the entanglement wedge into causal…
Gravity Dual of Connes Cocycle Flow
Raphael Bousso, Venkatesa Chandrasekaran, Pratik Rath +1
We define the "kink transform" as a one-sided boost of bulk initial data about the Ryu-Takayanagi surface of a boundary cut. For a flat cut, we conjecture that the resulting Wheele…
Quantum Information Bound on the Energy
Raphael Bousso, Arvin Shahbazi-Moghaddam, Marija Tomasevic
According to the classical Penrose inequality, the mass at spatial infinity is bounded from below by a function of the area of certain trapped surfaces. We exhibit quantum field th…
Quantum Penrose Inequality
Raphael Bousso, Arvin Shahbazi-Moghaddam, Marija Tomasevic
The classical Penrose inequality specifies a lower bound on the total mass in terms of the area of certain trapped surfaces. This fails at the semiclassical level. We conjecture a…
Entropy Variations and Light Ray Operators from Replica Defects
Srivatsan Balakrishnan, Venkatesa Chandrasekaran, Thomas Faulkner +2
We study the defect operator product expansion (OPE) of displacement operators in free and interacting conformal field theories using replica methods. We show that as approache…
Ignorance is Cheap: From Black Hole Entropy To Energy-Minimizing States In QFT
Raphael Bousso, Venkatesa Chandrasekaran, Arvin Shahbazi-Moghaddam
Behind certain marginally trapped surfaces one can construct a geometry containing an extremal surface of equal, but not larger area. This construction underlies the Engelhardt-Wal…
Higher-Point Positivity
Venkatesa Chandrasekaran, Grant N. Remmen, Arvin Shahbazi-Moghaddam
We consider the extension of techniques for bounding higher-dimension operators in quantum effective field theories to higher-point operators. Working in the context of theories po…
Energy is Entanglement
Stefan Leichenauer, Adam Levine, Arvin Shahbazi-Moghaddam
We compute the local second variation of the von Neumann entropy of a region in theories with a gravity dual. For null variations our formula says that the diagonal part of the Qua…