Joule-Thomson expansion for hairy black holes

Xing, Jing-Tong; Meng, Yu; Kuang, Xiao-Mei

doi:10.1016/j.physletb.2021.136604

Cited by 8 publications

(9 citation statements)

References 38 publications

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“…[ 46 ] These works indicated that, different from the van der Waals‐like fluid, the black hole in the AdS space has only a minimum inversion temperature, without a maximum one. The successive studies in various extended theories of gravity further confirmed these conclusions, [ 47–84 ] and the basic reason is the slight difference between the EoS of the black hole and the van der Waals‐like fluid.…”

Section: Introductionmentioning

confidence: 75%

The Joule–Thomson and Joule–Thomson‐Like Effects of the Black Holes in a Cavity

2023

Fortschritte der Physik

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When a black hole is enclosed in a cavity in asymptotically flat space, an effective volume can be introduced, and an effective pressure can be further defined as its conjugate variable. By this means, an extended phase space is constructed in a cavity, which resembles that in the anti‐de Sitter (AdS) space in many aspects. However, there are still some notable dissimilarities simultaneously. In this work, the Joule–Thomson (JT) effect of the black holes, widely discussed in the AdS space as an isenthalpic (constant‐mass) process, is shown to only have cooling region in a cavity. On the contrary, in a constant‐thermal‐energy process (the JT‐like effect), there is only heating region in a cavity. Altogether, different from the AdS case, there is no inversion temperature or inversion curve in a cavity. Our work reveals the subtle discrepancy between the two different extended phase spaces that is sensitive to the specific boundary conditions.

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Section: Introductionmentioning

confidence: 75%

The Joule–Thomson and Joule–Thomson‐Like Effects of the Black Holes in a Cavity

2023

Fortschritte der Physik

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“…Cooling and heating regions were displayed for different values of the charge e, g and mass M (enthalpy) [24]. We have also investigated the naked singularity which is not suitable for Joule-Thomson expansion because of the absence of an event horizon [64,65].…”

Section: Discussionmentioning

confidence: 99%

“…For instance, we cannot characterize event horizon for e = 2, g = 4 and M ≥ 2. For these values, an event horizon is imaginary and it relates to naked singularity, the isenthalpic curves in the T -P plane are imaginary [64].…”

Section: Joule-thomson Expansionmentioning

confidence: 99%

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Some remarks on criticality and thermodynamics of the dynamic phantom AdS black holes

Shahzad

Nosheen

2022

Eur. Phys. J. C

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In this paper, we discuss the thermodynamic phase-transition, thermal stability and criticality of dynamic phantom AdS black hole (BH) in the presence of electric charge e and magnetic charge g. To accomplish this, we construct the specific heat and other important thermodynamical parameters which help us to investigate the stability and criticality. The thermodynamical properties of dynamic phantom AdS BH are examined by utilizing the specific heat $$(C_P)$$ ( C P ) , volume expansivity $$(\beta )$$ ( β ) , isothermal compressibility $$(\kappa )$$ ( κ ) , Temperature vs Entropy (T–S), Pressure vs Volume (P–V) and Gibbs free energy G, graphically. Specific heat against entropy describes the divergency behaviour, which produces the second-order phase transition. We also obtain isenthalpic curves for both systems in the T–P plane and determine the cooling and heating regions by utilizing Joule–Thomson expansion. Moreover, we discuss the behaviour of (P–V) isotherm that is equal to the liquid/gas transition of the Van-Der Waals fluid is exactly matched to 3/8 also known as a universal number. Furthermore, we investigate Swallow-tail behaviour and also discuss the stability and instability of the small black hole (SBH), Intermediate black hole (IBH) and large black hole (LBH).

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“…Based on this theory, Ökcü and E. Aydiner were first to study the J-T effect of charged AdS black holes [45]. This topic becomes an active field and gets plenty of attention, it was subsequently extended to the study of all kinds of black holes [46][47][48][49][50][51][52]. Those rich studies showed that the heating and the cooling region could be perfectly reflected by the T-P diagram.…”

Section: Introductionmentioning

confidence: 99%

Joule-Thomson expansion of charged dilatonic black holes

Zhang¹,

Chen²,

Hassanabadi³

et al. 2022

Preprint

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Based on the Einstein-Maxwell theory, the Joule-Thomson (J-T) expansion of charged dilatonic black holes(the solutions are neither flat nor AdS) for (n + 1)-dimensional spacetime is studied.To this end, we analyze the effects of dimensions n and dilaton field α on the J-T expansion. The explicit expression of J-T coefficient is derived. In contrast to the effect of dimension, the inversion curve decreases with charge Q at low pressure and the opposite is observed at high pressure. We results show that with the increase of dimension n or parameter α, both the high and low pressure cut-off point and the minimum inversion temperature Tmin change. Moreover, concerning the ratio Tmin/Tc, we analyze it numerically and find that the ratio has an intersection point which is independent of the dilaton parameter α at a particular charge Q * . As n increases, the charge Q * corresponding to the intersection point first becomes larger, reaches the maximum value at n = 5, and then becomes smaller. Furthermore, we identify areas where heat and cold occur by investigating the isenthalpic curves, the behavior of minimum inversion mass Mmin explains the cooling-heating transition may not happen under some special conditions.

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Joule-Thomson expansion for hairy black holes

Cited by 8 publications

References 38 publications

The Joule–Thomson and Joule–Thomson‐Like Effects of the Black Holes in a Cavity

The Joule–Thomson and Joule–Thomson‐Like Effects of the Black Holes in a Cavity

Some remarks on criticality and thermodynamics of the dynamic phantom AdS black holes

Joule-Thomson expansion of charged dilatonic black holes

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