Diving inside a hairy black hole

Grandi, Nicolás; Landea, Ignacio Salazar

doi:10.1007/jhep05(2021)152

Cited by 21 publications

(10 citation statements)

References 35 publications

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“…In higher dimensions, there are examples of hairy black holes in Einstein-Gauss-Bonnet gravity with a minimally coupled charged scalar field with no self interactions [14]. 2 For other recent discussions of the interior of hairy black holes, see [16,17].…”

Section: Equations Of Motionmentioning

confidence: 99%

Inside an asymptotically flat hairy black hole

Dias

Horowitz

Santos

2021

J. High Energ. Phys.

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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.

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Section: Equations Of Motionmentioning

confidence: 99%

Inside an asymptotically flat hairy black hole

Dias

Horowitz

Santos

2021

J. High Energ. Phys.

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“…While the existence of the final Kasner universe has been shown to be sensitive to the potential of the scalar field [20,21], other epochs seem to be general features closely associated with the instability of the inner horizon of charged black holes without scalar hair. See other studies of black holes for which the Cauchy horizon is removed by scalar hairs [23][24][25][26][27]. Thus far, the structure as well as dynamical epochs inside the event horizon was studied by introducing a scalar field to black holes with maximally symmetric horizon.…”

Section: Introductionmentioning

confidence: 99%

Inside anisotropic black hole with vector hair

Cai

et al. 2022

J. High Energ. Phys.

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We study the internal structure of anisotropic black holes with charged vector hairs. Taking advantage of the scaling symmetries of the system, some radially conserved charges are found via the extension of the Noether theorem. Then, a general proof of no inner horizon of these black holes is presented and the geometry ends at a spacelike singularity. Before reaching the singularity, we find several intermediate regimes both analytically and numerically. In addition to the Einstein-Rosen bridge contracting towards the singularity, the instability triggered by the vector hair results in the oscillations of vector condensate and the anisotropy of spatial geometry. Moreover, the latter oscillates at twice the frequency of the condensate. Then, the geometry enters into Kasner epochs with spatial anisotropy. Due to the effects from vector condensate and U(1) gauge potential, there is generically a never-ending alternation of Kasner epochs towards the singularity. The character of evolution on approaching the singularity is found to be described by the Kasner epoch alternation with flipping of powers of the Belinskii-Khalatnikov-Lifshitz type.

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“…A natural extension of our work is to consider more types of flows, such as those sourced by combinations of interacting scalars, higher-rank fields, and axions [36][37][38][39][40]72]. One may also consider higher-curvature gravity [52], but note that we would expect corrections to the a T -function by analogy to the a-function of [9,10].…”

Section: Discussionmentioning

confidence: 99%

“…One may ask about Kasner flows sourced by more complicated matter sectors, such as the self-interacting φ 4scalar theory of [36] or φ coupled to Maxwellian and/or axionic fields [37][38][39]. One could even consider dimensional reductions of supergravity theories [40] or modify the gravitational theory to include higher-curvature terms [52] (upon appropriate changes to a T (7) [9,10]). Either scalar hair [53,54] or vector hair [55] generally prevents the formation of inner horizons in black holes, so trans-IR flows even in these theories will still end at a spacelike singularity, just as in the free scalar theory.…”

Section: General Kasner Singularitiesmentioning

confidence: 99%