Extremal black holes that are not extremal: maximal warm holes

Dias, Óscar J. C.; Horowitz, Gary T.; Santos, Jorge E.

doi:10.1007/jhep01(2022)064

Cited by 9 publications

(17 citation statements)

References 25 publications

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“…To see whether this sensitive dependence of the black hole singularity on its temperature is just a feature of AdS black holes, we study the interior of the solutions constructed in [7]. We find almost exactly the same behavior as seen in the holographic superconductors.…”

Section: Introductionmentioning

confidence: 61%

“…In fact, as we increase the charge on a RN black hole, it becomes unstable at a critical charge Q c . This instability and the resulting hairy black holes were studied (outside the horizon) in [7]. Here, we are interested in diving into the event horizon of these hairy black holes and studying the properties of their interior.…”

Section: Equations Of Motionmentioning

confidence: 99%

“…Indeed, the growing Maxwell field (4.15) causes a transition to a different Kasner solution with new exponents. 7 This transition can be described as follows.…”

Section: Kasner Epochs and Transitionsmentioning

confidence: 99%

“…In a recent paper [7], we added a massive, charged scalar field ψ to Einstein-Maxwell with a simple |ψ| 2 F ab F ab coupling. As above, when the electric charge is large enough, RN becomes unstable and develops charged scalar hair.…”

Section: Introductionmentioning

confidence: 99%

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Inside an Asymptotically Flat Hairy Black Hole

Dias,

Horowitz,

Santos

2021

Preprint

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We study the interior of a recently constructed family of asymptotically flat, charged black holes that develop (charged) scalar hair as one increases their charge at fixed mass. Inside the horizon, these black holes resemble the interior of a holographic superconductor. There are analogs of the Josephson oscillations of the scalar field, and the final Kasner singularity depends very sensitively on the black hole parameters near the onset of the instability. In an Appendix, we give a general argument that Cauchy horizons cannot exist in a large class of stationary black holes with scalar hair.

show abstract

Section: Introductionmentioning

confidence: 61%

Section: Equations Of Motionmentioning

confidence: 99%

“…Indeed, the growing Maxwell field (4.15) causes a transition to a different Kasner solution with new exponents. 7 This transition can be described as follows.…”

Section: Kasner Epochs and Transitionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inside an Asymptotically Flat Hairy Black Hole

Dias,

Horowitz,

Santos

2021

Preprint

Self Cite

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“…In the black hole background, as a warped product, these instabilities do not occur. Also notice that, when both the black hole and the scalars are charged under the U(1) gauge fields, qualitatively different black hole solutions may exist [9], whose investigation is beyond the scope of this work.…”

Section: Introductionmentioning

confidence: 99%

Large and Small Non-extremal Black Holes, Thermodynamic Dualities, and the Swampland

Cribiori¹,

Dierigl²,

Gnecchi³

et al. 2022

Preprint

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In this paper we discuss black hole solutions parametrized by their entropy S and temperature T in gravitational effective theories. We are especially interested in the analysis of the boundary regions in the T − S diagram, i.e. large/small values of entropy and temperature, and their relation to Swampland constraints. To explore this correlation, we couple the gravitational theories to scalar fields and connect limits of thermodynamic quantities of black holes to scalar field excursions in the corresponding solutions. Whenever the scalar fields traverse an infinite field distance, the Swampland Distance Conjecture allows for a reformulation in terms of entropy-or temperature-distance. The effective theories with scalars we investigate are Einstein-Maxwell-dilaton theory as well as N = 2 supergravity in four dimensions. The relation of the latter to type II string theory compactified on Calabi-Yau 3-folds often allows for a direct identification of the corresponding light tower of states. These setups also point towards various dualities between asymptotic regions of the black hole solution. In the context of N = 2 supergravity black holes, these thermodynamic dualities have an interpretation in terms of T-and S-dualities along the internal directions and their natural action on Kaluza-Klein and winding states.

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Gregory-Laflamme and superradiance encounter black resonator strings

Dias

Ishii

Murata

et al. 2023

J. High Energ. Phys.

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We construct novel black strings that are neither time-translation invariant, nor axisymmetric, nor translationally invariant in the string direction, but nevertheless have a helical Killing vector field. These solutions branch from the superradiant instability of D = 6 Myers-Perry black strings with equal angular momenta. We coin these solutions as black resonator strings and we find that they have more entropy than Myers-Perry black strings for the energies and angular momenta where both solutions coexist. We also construct Kaluza-Klein geons, which share the symmetries of black resonator strings, but are horizonless. Unlike in other superradiant systems, Kaluza-Klein geons are not the horizonless limit of black resonator strings and are instead entirely separate solutions.

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Extremal black holes that are not extremal: maximal warm holes

Cited by 9 publications

References 25 publications

Inside an Asymptotically Flat Hairy Black Hole

Inside an Asymptotically Flat Hairy Black Hole

Large and Small Non-extremal Black Holes, Thermodynamic Dualities, and the Swampland

Gregory-Laflamme and superradiance encounter black resonator strings

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