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arXiv 2408.01149hep-th
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吉布斯熵非广延推广中的BTZ黑洞

BTZ Black Hole In The Non-Extensive Generalizations of Gibbs Entropy

Amijit Bhattacharjee, Prabwal Phukon

AI总结:

本研究在吉布斯熵的非广延推广框架下,探究旋转与带电BTZ黑洞的热力学及几何性质,发现Kaniadakis熵情形下存在BH熵中没有的Davies型等相变,且对应曲率奇点。

摘要:

我们在吉布斯熵的非广延推广框架下,研究了(2+1)维Banados-Teitelboim-Zanelli(BTZ)黑洞的热力学与热力学几何性质。我们在这些非广延熵形式体系中,同时探究了旋转BTZ黑洞(R-BTZ)和带电BTZ黑洞(C-BTZ)。我们将黑洞的贝肯斯坦-霍金(BH)熵用三种非广延熵表述,分别是:Kaniadakis熵、Renyi熵和Barrow熵。我们研究了这些非广延熵对两类系综下BTZ黑洞的热力学相结构与几何的影响:对R-BTZ黑洞为固定角动量$(J)$系综与固定角速度$(Ω)$系综,对C-BTZ黑洞为固定电荷$(Q)$系综与固定电势$(Φ)$系综,其中$J$、$Ω$、$Q$、$Φ$分别代表对应黑洞的角动量、角速度、电荷与电势。针对所有非广延熵情形,我们研究了黑洞的Ruppeiner几何与几何热力学(GTD)几何。我们发现,在上述所有热力学系综的Kaniadakis熵情形下,带电与旋转BTZ黑洞中均存在Davies型相变以及Hawking-Page相变,这些相变在BH熵情形中并未被观测到。我们还发现,Kaniadakis熵对应的Ruppeiner标量与GTD标量呈现出曲率奇点,这些奇点与旋转和带电BTZ黑洞中的Davies型相变相对应。

英文摘要:

We study the thermodynamics and thermodynamic geometry of the (2+1) dimensional Banados-Teitelboim-Zanelli(BTZ) black hole within the framework of the non-extensive generalizations of Gibbs entropy. We investigate both the rotating (R-BTZ) and the charged (C-BTZ) BTZ black holes in these non-extensive entropy formalisms. We write down the Bekenstein-Hawking(BH) entropy of the black hole in terms of the non-extensive entropies namely: Kaniadakis entropy, Renyi entropy and Barrow entropy. We investigate their impact on the thermodynamic phase structure and geometry of the BTZ black holes in both the ensembles i.e. the fixed $(J)$ and fixed $(Ω)$ ensemble for the R-BTZ black hole and the fixed $(Q)$ and the fixed $(Φ)$ ensemble for the C-BTZ black hole where $ J$, $Ω$, $Q$ and $Φ$ represent the angular momentum, angular velocity, charge and the electric potential of the respective black holes . We investigate the Ruppeiner and geometrothermodynamic(GTD) geometries of the black hole for all the non-extensive entropy cases. We find that there are Davies type along with Hawking-Page phase transitions in both the charged and rotating BTZ black hole for the Kaniadakis entropy case in all the above mentioned thermodynamic ensembles. These phase transitions were not seen in the BH entropy case. We also find that the Ruppeiner and the GTD scalar for the Kaniadakis entropy show curvature singularities corresponding to the Davies type phase transitions in both the rotating and charged BTZ black holes.

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