Hairy Taub-NUT/bolt-AdS solutions in Horndeski theory

Arratia, Esteban; Corral, Cristóbal; Figueroa, José; Sanhueza, Leonardo

doi:10.1103/physrevd.103.064068

Cited by 22 publications

(13 citation statements)

References 139 publications

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“…These spaces began to be studied because of their analogy with Yang-Mills instantons [83]. For recent work in this direction we suggest [84]; therein scalar fields in Horndeski theory source the spaces. Our purpose here is to use these geometries as gravitational instantons to carry out semi-classical calculations.…”

Section: The Nuts and Bolts Of Modmaxmentioning

confidence: 99%

“…A lower value of the action indicates which thermodynamic state is preferred by the system. Varying only the nut parameter tells We consider the standard framework of the black hole thermodynamics [91][92][93][94][95] and apply it to Euclidean geometries with nuts or bolts, as in [69,84]. Let us recall that our boundary conditions fix β, and so T and n with it.…”

Section: Thermodynamic Phase Structurementioning

confidence: 99%

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Nonlinear extensions of gravitating dyons: from NUT wormholes to Taub-Bolt instantons

Flores-Alfonso

Linares

Maceda

2021

J. High Energ. Phys.

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Recent work has shown the existence of a unique nonlinear extension of electromagnetism which preserves conformal symmetry and allows for the freedom of duality rotations. Moreover, black holes and gravitational waves have been found to exist in this nonlinearly extended electrovacuum. We generalise these dyonic black holes in two major ways: with the relaxation of their horizon topology and with the inclusion of magnetic mass. Motivated by recent attention to traversable wormholes, we use this new family of Taub-NUT spaces to construct AdS wormholes. We explore some thermodynamic features by using a semi-classical approach. Our results show that a phase transition between the nut and bolt configurations arises in a similar way to the Maxwellian case.

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Section: The Nuts and Bolts Of Modmaxmentioning

confidence: 99%

Section: Thermodynamic Phase Structurementioning

confidence: 99%

Nonlinear extensions of gravitating dyons: from NUT wormholes to Taub-Bolt instantons

Flores-Alfonso

Linares

Maceda

2021

J. High Energ. Phys.

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“…It is expected that these gravitational instantons play a similar role in theories of quantum gravity [12] as the one played by Yang-Mills instantons in quantum field theory. Several models has been investigated in this direction [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

(A)dS Taub-NUT and exact black bounces with scalar hair

Barrientos¹,

Cisterna²,

Mora³

et al. 2022

Preprint

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We present a new family of exact four-dimensional Taub-NUT spacetimes in Einstein-Λ theory supplemented with a conformally coupled scalar field exhibiting a power-counting superrenormalizable potential. Our configurations are constructed in the following manner: A solution of a conformally coupled theory with a conformal potential, henceforth the seed (gµν , φ), is transformed by the action of a specific change of frame in addition with a simultaneous shift of the seed scalar field. The conformal factor of the transformation and the shift are both affine functions of the original scalar φ. The new configuration, (ḡµν , φ), solves the field equations of a conformally coupled theory with the extended aforementioned super-renormalizable potential, this under the presence of an effective cosmological constant. The new spectrum of solutions is notoriously enhanced with respect to the original seed containing regular black holes, wormholes, and bouncing cosmologies. We highlight the existence of two types of exact black bounces given by de Sitter and anti-de Sitter geometries that transit across three different configurations each. The de Sitter geometries transit from a regular black hole with event and cosmological horizons to a bouncing cosmology that connects two de Sitter Universes with different values of the asymptotic cosmological constant. An intermediate phase, which might be represented by two different configurations, takes place. These configurations are given by a de Sitter wormhole or by a bouncing cosmology that connects two de Sitter Universes, both under the presence of a cosmological horizon. On the other hand, the anti-de Sitter geometries transit from a regular black hole with inner and event horizons to a wormhole that connects two asymptotic boundaries with different constant curvatures. The intermediate phase is given in this case by an anti-de Sitter regular black hole with a single event horizon. This regular black hole might appear in two different configurations. As a regular anti-de Sitter black hole inside of an anti-de Sitter wormhole or as an anti-de Sitter regular black hole with a cosmological bounce in its interior. All these geometries are shown to be smoothly connected by the mass parameter only. Other standard stationary black holes, bouncing cosmologies and wormholes are also identified.

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“…Most of the studies on TN spacetimes is done in the Euclidean regime [5][6][7][8][9][10][11][12][13][14][15][16][17][18] because gravitational instantons [19] might play a role in the path integral formulation of gravity. However, the Lorentzian version of TN spacetime was critically revisited [20,21].…”

Section: Introductionmentioning

confidence: 99%

The First Law for the Lorentzian Rotating Taub-NUT

Frodden,

Hidalgo

2021

Preprint

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We show that the first law for the rotating Taub-NUT is straightforwardly established with the surface charge method. The entropy is explicitly found as a charge and its value is not proportional to the horizon area. We conclude that there are unavoidable contributions from the Misner strings to the charges, still the mass and angular momentum gets standard values. However, there are no independent charges associated with the Misner strings.

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Hairy Taub-NUT/bolt-AdS solutions in Horndeski theory

Cited by 22 publications

References 139 publications

Nonlinear extensions of gravitating dyons: from NUT wormholes to Taub-Bolt instantons

Nonlinear extensions of gravitating dyons: from NUT wormholes to Taub-Bolt instantons

(A)dS Taub-NUT and exact black bounces with scalar hair

The First Law for the Lorentzian Rotating Taub-NUT

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