arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2507.03469gr-qc
收藏

无事件视界时空中的热力学

Thermodynamics in space-times without horizons

Raymond Isichei, João Magueijo

AI总结:

本文研究无事件视界但具有优先类时连接面的时空,发现其表面可具有零能量,并由此导出由零能量条件约束的熵、温度和表面压强关系,同时讨论了负温度对热力学第三定律的启示。

摘要:

我们考虑没有事件视界、但具有一个优先类时连接面的时空的能量学与热力学。这类时空可以作为引力真空星(gravastar)及其他使黑洞视界内部正则化的构造的极限情形出现,也可以来源于将非渐近平坦空间的一部分概念性地切除并与平坦空间粘合。我们发现,这类表面可以被构造成具有零能量,因此这类空间的能量学不会受到它们的拖累。它们确实具有横向压强,其大小由表面引力的跃变所决定。由此得到一种特殊的物质热力学,具有良好定义的熵、温度和表面压强,并受到由零能量条件所产生的特定关系的约束。这一点通过欧几里得路径积分得到确认,但前提是应当使用Tolman-Ehrenfest温度。于是,该空间的熵就是以基本面积为单位测量的类时表面的面积,而物质温度正比于横向压强,因而正比于表面引力的跃变。然而,当加入引力作用量后,该表面的自由能也为零。对于某些此类空间,温度会变为负值,这一事实引发了关于热力学第三定律的有趣问题。

英文摘要:

We consider the energetics and thermodynamics of spacetimes with no horizons, but endowed with a preferred timelike junction surface. They could arise as a limiting case of the gravastar and other constructions regularizing the interior of the horizon of a black hole, or from the conceptual cutting of a portion of a non-asymptotically flat space and gluing it with flat space. We find that such surfaces can be made to have zero energy, so that the energetics of such spaces is not encumbered by them. They do have a transverse pressure, fixed by the jump in surface gravity. A peculiar matter thermodynamics then follows, with well defined entropy, temperature and surface pressure, constrained by specific relations arising from the zero energy condition. This is confirmed by the Euclidean path integral, with the proviso that the Tolman-Ehrenfest temperature should be used. The entropy of the space is then the area of the timelike surface in units of a fundamental area, and the matter temperature is proportional to the transverse pressure and so the jump in surface gravity. However, when the gravitational action is added, the free energy of the surface is also zero. The fact that for some such spaces the temperature comes out negative raises interesting questions regarding the third law of thermodynamics.

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。

↑