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arXiv 1312.4516hep-th
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具有非最小标量场的Lovelock黑洞的热力学

Thermodynamics of Lovelock black holes with a nonminimal scalar field

Francisco Correa, Mokhtar Hassaine

摘要:

我们来源于Lovelock引力理论的索引为一个整数k,并通过要求一个唯一的反德西特真空与自相互作用的非最小标量场在任意维d固定。对于每一个不等价的Lovelock引力理论,我们建立了一个两参数自相互作用势的存在性,允许导出一类具有平面视界的黑洞解,对于任何非最小耦合参数值。在解的解析分析中,我们证明,一旦将欧几里得作用量正则化,来自引力的质量贡献就一阶接一阶地完全抵消了来自物质部分的质量贡献,从而使质量消失。这一结果与解的熵(与在视界上估计的时间流逝函数成比例)也为零的事实是一致的。因此,出现在溶液中的积分常数被解释为一种在高温下消失的头发。

英文摘要:

We source the Lovelock gravity theories indexed by an integer k and fixed by requiring a unique anti-de Sitter vacuum with a self-interacting nonminimal scalar field in arbitrary dimension d. For each inequivalent Lovelock gravity theory indexed by the integer k, we establish the existence of a two-parametric self-interacting potential that permits to derive a class of black hole solutions with planar horizon for any arbitrary value of the nonminimal coupling parameter. In the thermodynamical analysis of the solution, we show that, once regularized the Euclidean action, the mass contribution coming form the gravity side exactly cancels, order by order, the one arising from the matter part yielding to a vanishing mass. This result is in accordance with the fact that the entropy of the solution, being proportional to the lapse function evaluated at the horizon, also vanishes. Consequently, the integration constant appearing in the solution is interpreted as a sort of hair which turns out to vanish at high temperature.

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