Introduction

Giddings, Franklin H.

doi:10.7312/hall90786-001

Cited by 10 publications

(18 citation statements)

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“…67 66 One way the black hole state may be probed is through high energy gravitational scattering [162,163,439]. An EFT approach [125,440] could also be useful at large impact parameters, to study the onset of black hole formation, perhaps shedding light on the analytic properties of the gravitational S-matrix [162,163]. Another interesting regime to explore the manifestation of all these properties is the large-D limit of general relativity [441,442].…”

Section: Beyond Perturbation Theory: a Deeper Structurementioning

confidence: 99%

The effective field theorist’s approach to gravitational dynamics

Porto¹

2016

Physics Reports

366

434

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Section: Beyond Perturbation Theory: a Deeper Structurementioning

confidence: 99%

The effective field theorist’s approach to gravitational dynamics

Porto¹

2016

Physics Reports

366

434

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“…This appendix presents a brief discussion of time slicings that extend into the BH interior, such as are used in the main text. Further discussion of dynamics on such slices is planned for future work [29].…”

Section: Appendix a Bh Time Slicingsmentioning

confidence: 99%

Nonviolent unitarization: basic postulates to soft quantum structure of black holes

Giddings

2017

J. High Energ. Phys.

131

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A first-principles approach to the unitarity problem for black holes is systematically explored, based on the postulates of 1) quantum mechanics 2) the ability to approximately locally divide quantum gravitational systems into subsystems 3) correspondence with quantum field theory predictions for appropriate observers and (optionally) 4) universality of new gravitational effects. Unitarity requires interactions between the internal state of a black hole and its surroundings that have not been identified in the field theory description; correspondence with field theory indicates that these are soft. A conjectured information-theoretic result for information transfer between subsystems, partly motivated by a perturbative argument, then constrains the minimum coupling size of these interactions of the quantum atmosphere of a black hole. While large couplings are potentially astronomically observable, given this conjecture one finds that the new couplings can be exponentially small in the black hole entropy, yet achieve the information transfer rate needed for unitarization, due to the large number of black hole internal states. This provides a new possible alternative to arguments for large effects near the horizon. If universality is assumed, these couplings can be described as small, soft, state-dependent fluctuations of the metric near the black hole. Open questions include that of the more fundamental basis for such an effective picture.

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“…Such an increased decay rate has important consequences for the statistical mechanics and thermodynamics of black holes [28], and in particular indicates a smaller number of black hole states, with corresponding entropy S bh , than given by the Bekenstein-Hawking entropy S BH . A question is whether this conclusion can be avoided, due to special such couplings that do not produce extra flux [41].…”

Section: Generalizations Extra Flux Correspondence and Causalitymentioning

confidence: 99%

Effective field theory models for nonviolent information transfer from black holes

Giddings

Shi

2014

Phys. Rev. D

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Transfer of quantum information from the interior of a black hole to its atmosphere is described, in models based on effective field theory. This description illustrates that such transfer need not be violent to the semiclassical geometry or to infalling observers, and in particular can avoid producing a singular horizon or "firewall." One can specifically quantify the rate of information transfer, and show that a rate necessary to unitarize black hole evaporation produces a relatively mild modification to the stress tensor near the horizon. In an exterior description of the transfer, the new interactions responsible for it are approximated by "effective sources" acting on fields in the black hole atmosphere.If the necessary interactions couple to general modes in the black hole atmosphere, one also finds a straightforward mechanism for information transfer rates to increase when a black hole is mined, avoiding paradoxical behavior. Correspondence limits are discussed, in the presence of such new interactions, for both small black holes and large ones; the near-horizon description of the latter is approximately that of Rindler space. *

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Introduction

Cited by 10 publications

References 0 publications

The effective field theorist’s approach to gravitational dynamics

The effective field theorist’s approach to gravitational dynamics

Nonviolent unitarization: basic postulates to soft quantum structure of black holes

Effective field theory models for nonviolent information transfer from black holes

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