Inconsistency of islands in theories with long-range gravity

@article{Geng2022InconsistencyOI,
  title={Inconsistency of islands in theories with long-range gravity},
  author={Hao Geng and Andreas Karch and Carlos Perez-Pardavila and S. Raju and Lisa Randall and Marcos Riojas and Sanjit Shashi},
  journal={Journal of High Energy Physics},
  year={2022},
  volume={2022},
  pages={1-46}
}
In ordinary gravitational theories, any local bulk operator in an entanglement wedge is accompanied by a long-range gravitational dressing that extends to the asymptotic part of the wedge. Islands are the only known examples of entanglement wedges that are disconnected from the asymptotic region of spacetime. In this paper, we show that the lack of an asymptotic region in islands creates a potential puzzle that involves the gravitational Gauss law, independently of whether or not there is a non… 
Islands and Light Gravitons in type IIB String Theory
We consider the setup of a black hole in AdS 4 coupled to an external bath, embedded in type IIB string theory. We study quantum extremal islands in these backgrounds, in relation to the existence of
Islands in flat-space cosmology
Flat-space cosmologies (FSCs) are solutions to three-dimensional theories of gravity without cosmological constants that have cosmological horizons. A detector located near the timelike singularity
Entanglement island, miracle operators and the firewall
  • X. Qi
  • Computer Science
    Journal of High Energy Physics
  • 2022
TLDR
The implication of miracle operators in understanding the firewall paradox is studied, and it is shown that the assumption of smooth replica AdS geometry with boundary condition set by the flat space bath has to break down when the particular measurement operator is applied to the bath.
The universality of islands outside the horizon
Abstract We systematically calculate the quantum extremal surface (QES) associated with Hawking radiation for general D-dimensional (D ≥ 2) asymptotically flat (or AdS) eternal black holes using the
Failure of the split property in gravity and the information paradox
  • S. Raju
  • Physics
    Classical and Quantum Gravity
  • 2022
In an ordinary quantum field theory, the ‘split property’ implies that the state of the system can be specified independently on a bounded subregion of a Cauchy slice and its complement. This
Holography from the Wheeler-DeWitt equation
Abstract In a theory of quantum gravity, states can be represented as wavefunctionals that assign an amplitude to a given configuration of matter fields and the metric on a spatial slice. These
On the questions of asymptotic recoverability of information and subsystems in quantum gravity
A longstanding question in quantum gravity regards the localization of quantum information; one way to formulate this question is to ask how subsystems can be defined in quantumgravitational systems.
Disorder averaging and its UV discontents
We present a stringy realization of quantum field theory ensembles in D ≤ 4 spacetime dimensions, thus realizing a disorder averaging over coupling constants. When each member of the ensemble is a
Glimmers of a post-geometric perspective
Quantum gravitational effects can become important at low energy if the wavefunction of the metric field fails to be peaked around a classical configuration. We try to understand such deviations from
On the assumptions leading to the information loss paradox
Abstract The information loss paradox is usually stated as an incompatibility between general relativity and quantum mechanics. However, the assumptions leading to the problem are often overlooked
...
...

References

SHOWING 1-10 OF 115 REFERENCES
Islands in cosmology
A quantum extremal island suggests that a region of spacetime is encoded in the quantum state of another system, like the encoding of the black hole interior in Hawking radiation. We study conditions
Observables, gravitational dressing, and obstructions to locality and subsystems
Quantum field theory - our basic framework for describing all non-gravitational physics - conflicts with general relativity: the latter precludes the standard definition of the former's essential
Massive islands
We comment on the role of the graviton mass in recent calculations of the Page curve using holographic ideas. All reliable calculations of the Page curve in more than 2+1 spacetime dimensions have
Information Transfer with a Gravitating Bath
Late-time dominance of entanglement islands plays a critical role in addressing the information paradox for black holes in AdS coupled to an asymptotic non-gravitational bath. A natural question is
A physical protocol for observers near the boundary to obtain bulk information in quantum gravity
We consider a set of observers who live near the boundary of global AdS, and are allowed to act only with simple low-energy unitaries and make measurements in a small interval of time. The observers
Entanglement islands in higher dimensions
It has been suggested in recent work that the Page curve of Hawking radiation can be recovered using computations in semi-classical gravity provided one allows for "islands" in the gravity region of
Quantum tasks require islands on the brane
In recent work, it was argued that quantum computations with inputs and outputs distributed in spacetime, or quantum tasks, impose constraints on entanglement in holographic theories. The resulting
Entanglement between two disjoint universes
We use the replica method to compute the entanglement entropy of a universe without gravity entangled in a thermofield-double-like state with a disjoint gravitating universe. Including wormholes
The Gravitational Hamiltonian, action, entropy and surface terms
We give a derivation of the gravitational Hamiltonian starting from the Einstein - Hilbert action, keeping track of all surface terms. This derivation can be applied to any spacetime that
Gravity/ensemble duality
For the first time, a gravitational calculation was recently shown to yield the Page curve for the entropy of Hawking radiation, consistent with unitary evolution. However, the calculation takes as
...
...