Repulsive interactions in the microstructure of regular Hayward black hole in anti-de Sitter spacetime

Kumara, A. Naveena; Rizwan, C. L. Ahmed; Hegde, Kartheek; Ajith, K. M.

doi:10.1016/j.physletb.2020.135556

Cited by 25 publications

(12 citation statements)

References 27 publications

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“…The critical exponent is 0.537, which is approximately equal to the universal value 1/2. This result is similar to the one earlier obtained in different black holes [22,34,35,38,39].…”

Section: Thermodynamics and Phase Structuresupporting

confidence: 92%

“…Microstructure was found to be distinct, with the presence of both repulsive and attractive interactions in both the SBH and LBH phases. In our recent paper, we have investigated the microstructure of regular Hayward and Born-Infeld AdS black holes [39,40]. The microscopic interactions observed is similar to the case of charged AdS black holes in regular Hayward case.…”

Section: Introductionmentioning

confidence: 94%

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Coexistent Physics and Microstructure of the Regular Bardeen Black Hole in Anti-de Sitter Spacetime

Rizwan,

Kumara,

Hegde

et al. 2020

Preprint

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We study the phase structure and the microscopic interactions in regular Bardeen AdS black hole. The stable and metastable phases in the black hole are analysed through coexistence and spinodal curves. The solutions are obtained numerically as the analytic solution to the coexistence curve is not feasible. The P r − T r coexistence equation is obtained using a fitting formula. The coexistence and spinodal curves are plotted in P r − T r and T r − V r planes to explore the phase structure of the black hole. In the second part of our study, we were able to probe the microscopic interactions of regular Bardeen AdS black hole using the novel Ruppeiner geometry proposed by S.W. Wei et.al Phys. Rev. Lett.123, 071103 (2019). It is found that the microscopic interactions are not same in the small black hole (SBH) and large black hole (LBH) phases. In the SBH phase, there exists a repulsive interaction in the microstructure in the low temperature regime. In contrast, the microstructure associated with the LBH phase has attractive interaction throughout the parameter space. We found that, along the coexistence temperature both the SBH and LBH branches diverge to negative infinity with a critical exponent equal to 1/2.

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“…The critical exponent is 0.537, which is approximately equal to the universal value 1/2. This result is similar to the one earlier obtained in different black holes [22,34,35,38,39].…”

Section: Thermodynamics and Phase Structuresupporting

confidence: 92%

Section: Introductionmentioning

confidence: 94%

Coexistent Physics and Microstructure of the Regular Bardeen Black Hole in Anti-de Sitter Spacetime

Rizwan,

Kumara,

Hegde

et al. 2020

Preprint

Self Cite

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“…The behaviour is similar to that of the normalised Ruppeiner scalar in (T, V ) parameter space [12,32]. For P r < 1, below critical pressure, R N has two negative divergences.…”

Section: Thermodynamics and Phase Transition Of The Black Holesupporting

confidence: 56%

“…When applied to a conventional van der Waals system this method gives expected results, where the dominant interaction among the fluid molecules is always attractive in all phases. Surprisingly charged black holes showed deviation from this, wherein a repulsive dominant interaction was also observed for certain physical conditions [7,8,32]. However this result is not universal for all black holes, the five-dimensional neutral Gauss-Bonnet AdS black holes resembles exactly to a van der Waals fluid [12].…”

Section: Introductionmentioning

confidence: 94%

Microstructure of five-dimensional neutral Gauss-Bonnet black hole in anti-de Sitter spacetime via $P-V$ criticality

Kumara¹,

Rizwan²,

Hegde³

et al. 2020

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In this article, we analytically investigate the microstructure of a five-dimensional neutral Gauss-Bonnet black hole, in the background of anti-de Sitter spacetime, using scalar curvature of the Ruppeiner geometry constructed via adiabatic compressibility. The microstructure details associated with the small-large black hole phase transition are probed in the parameter space of pressure and volume. The curvature scalar shows similar properties for both phases of the black hole, it diverges in the vicinity of critical point and approaches zero for extremal black holes. We show that the dominant interaction among black hole molecules is attractive. This study also affirms that the nature of the microstructure interaction remains unchanged during the small-large black hole phase transition, even though the microstructures are different for both phases.

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“…is widely used for investigating the thermodynamics in regular black holes (RHBs), e.g. [3][4][5][6][7][8][9]. This method is based on the first law of thermodynamics and the direct correspondence between internal energy and BH mass, U = M .…”

Section: Introductionmentioning

confidence: 99%

Entropy and Topology of Regular Black Holes

Chen¹,

Miao²

2021

Preprint

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Repulsive interactions in the microstructure of regular Hayward black hole in anti-de Sitter spacetime

Cited by 25 publications

References 27 publications

Coexistent Physics and Microstructure of the Regular Bardeen Black Hole in Anti-de Sitter Spacetime

Coexistent Physics and Microstructure of the Regular Bardeen Black Hole in Anti-de Sitter Spacetime

Microstructure of five-dimensional neutral Gauss-Bonnet black hole in anti-de Sitter spacetime via $P-V$ criticality

Entropy and Topology of Regular Black Holes

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