Butterfly velocity bound and reverse isoperimetric inequality

Feng, Xing-Hui; Lü, H.

doi:10.1103/physrevd.95.066001

Cited by 26 publications

(47 citation statements)

References 63 publications

(89 reference statements)

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“…The thermodynamic volumes for the black holes we constructed in this paper can all be expressed locally as This formula is analogous to the one obtained in [9] for black holes in two-derivative gravities.…”

Section: Conclusion and Discussionmentioning

confidence: 95%

“…In fact, for the local volume formula of static black holes proposed in [9], the CGKP conjecture becomes a simple consequence of the null-energy condition. However, counter examples were also found in some super rotating solutions where the horizon geometry becomes no longer compact [10,11].…”

Section: 2)mentioning

confidence: 99%

“…Since the CGKP conjecture may be related to the energy condition for black holes with compact horizons [9], we expect that the RII will be violated in higher-derivative gravities, which typically involve ghost excitations. A simple example is provided by Einstein gravity with a cosmological constant , extended with quadratic curvature invariants α R 2 + β R μν R μν .…”

Section: 2)mentioning

confidence: 99%

“…It was argued [9] that this inequality in Einstein gravity with minimally coupled matter for static black holes is guaranteed by the null-energy condition. In higher-derivative gravities, or gravities with nonminimally coupled matter, the entropy is no longer simply one quarter of the area of the horizon.…”

Section: Violations Of Riimentioning

confidence: 99%

“…Interestingly the integration is more naturally performed from horizon to asymptotic infinity [8]. Recently, a local formula of determining the volume of a black hole was proposed for static black holes, and was tested against a large number of known black holes [9].…”

Section: 2)mentioning

confidence: 99%

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Horndeski gravity and the violation of reverse isoperimetric inequality

2017

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We consider Einstein-Horndeski-Maxwell gravity, together with a cosmological constant and multiple Horndeski axions. We construct charged AdS planar black holes in general dimensions where the Horndeski axions span over the planar directions. We analyze the thermodynamics and obtain the black hole volumes. We show that the reverse isoperimetric inequality can be violated, implying that these black holes can store information more efficiently than the Schwarzschild black hole.

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Section: Conclusion and Discussionmentioning

confidence: 95%

Section: 2)mentioning

confidence: 99%

Section: 2)mentioning

confidence: 99%

Section: Violations Of Riimentioning

confidence: 99%

Section: 2)mentioning

confidence: 99%

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Horndeski gravity and the violation of reverse isoperimetric inequality

2017

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What Can a GNOME Do? Search Targets for the Global Network of Optical Magnetometers for Exotic Physics Searches

Afach,

Aybas Tumturk,

Bekker

et al. 2023

Annalen der Physik

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Numerous observations suggest that there exist undiscovered beyond‐the‐standard‐model particles and fields. Because of their unknown nature, these exotic particles and fields could interact with standard model particles in many different ways and assume a variety of possible configurations. Here, an overview of the global network of optical magnetometers for exotic physics searches (GNOME), the ongoing experimental program designed to test a wide range of exotic physics scenarios, is presented. The GNOME experiment utilizes a worldwide network of shielded atomic magnetometers (and, more recently, comagnetometers) to search for spatially and temporally correlated signals due to torques on atomic spins from exotic fields of astrophysical origin. The temporal characteristics of a variety of possible signals currently under investigation such as those from topological defect dark matter (axion‐like particle domain walls), axion‐like particle stars, solitons of complex‐valued scalar fields (Q‐balls), stochastic fluctuations of bosonic dark matter fields, a solar axion‐like particle halo, and bursts of ultralight bosonic fields produced by cataclysmic astrophysical events such as binary black hole mergers are surveyed.

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Charged BTZ-like black hole solutions and the diffusivity-butterfly velocity relation

Sin

Tian

et al. 2018

J. High Energ. Phys.

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We show that there exists a class of charged BTZ-like black hole solutions in Lifshitz spacetime with a hyperscaling violating factor. The charged BTZ black hole is characterized by a charge-dependent logarithmic term in the metric function. As concrete examples, we give five such charged BTZ-like black hole solutions and the standard charged BTZ metric can be regarded as a special instance of them. In order to check the recent proposed universal relations between diffusivity and the butterfly velocity, we first compute the diffusion constants of the standard charged BTZ black holes and then extend our calculation to arbitrary dimension d, exponents z and θ. Remarkably, the case d = θ and z = 2 is a very special in that the charge diffusion D c is a constant and the energy diffusion D e might be ill-defined, but v 2 B τ diverges. We also compute the diffusion constants for the case that the DC conductivity is finite but in the absence of momentum relaxation.

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Butterfly velocity bound and reverse isoperimetric inequality

Cited by 26 publications

References 63 publications

Horndeski gravity and the violation of reverse isoperimetric inequality

Horndeski gravity and the violation of reverse isoperimetric inequality

What Can a GNOME Do? Search Targets for the Global Network of Optical Magnetometers for Exotic Physics Searches

Charged BTZ-like black hole solutions and the diffusivity-butterfly velocity relation

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