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arXiv 2408.13638gr-qcastro-ph.COhep-th
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Tsallis熵的拉格朗日表述

Lagrangian formulation of the Tsallis entropy

Rocco D'Agostino, Giuseppe Gaetano Luciano

AI总结:

本文在f(R)引力框架下利用Wald熵公式证明Tsallis熵可由拉格朗日量R^{1+ε}导出,并探讨其对黑洞热力学稳定性及宇宙学观测的意义。

摘要:

我们研究了Tsallis熵的引力起源,该熵由非可加性指标$δ$刻画。利用Wald形式体系,在$f(R)$修正引力理论框架内,我们对球对称真空场方程的常曲率解计算了黑洞视界上的熵。通过这一做法,我们证明Tsallis熵可以有效地从拉格朗日量$\mathcal{L}\propto R^{1+ε}$的推广中导出,其中$ε=δ-1$量化了与广义相对论的微小偏离。最后,我们结合宇宙学观测检验了这些结果的物理含义,并详细讨论了解决Schwarzschild黑洞热力学不稳定性的可能性。

英文摘要:

We investigate the gravitational origin of the Tsallis entropy, characterized by the nonadditive index $δ$. Utilizing Wald's formalism within the framework of $f(R)$ modified theories of gravity, we evaluate the entropy on the black hole horizon for constant curvature solutions to the spherically symmetric vacuum field equations. In so doing, we demonstrate that the Tsallis entropy can be effectively derived from a generalization of the Lagrangian $\mathcal{L}\propto R^{1+ε}$, where $ε=δ-1$ quantifies small deviations from general relativity. In conclusion, we examine the physical implications of our findings in light of cosmological observations and elaborate on the possibility of solving the thermodynamic instability of Schwarzschild black holes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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