arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0711.4013gr-qcastro-phhep-th
收藏

全息暗能量:量子关联与物理描述

Holographic dark energy: quantum correlations against thermodynamical description

R. Horvat

摘要:

考虑全息暗能量(HDE)的熵远比相同大小的黑洞的熵具有更大的限制性,从而讨论了HDE的经典和量子熵性质。在宇宙学背景下(HDE被提升为宇宙暗能量的合理候选者),HDE应该被视为由事件视界和视界内物质组成的组合态。通过子系统之间的任何相互作用,视界和内部都变得纠缠,从而提高了它们的量子相关性对组合态的几乎纯净负责的可能性。在这种情况下,两个子系统的纠缠熵几乎是相同的,并且与内部或视界的热(粗粒度)熵具有相同的量级。然而,在热力学的背景下,只有添加剂粗粒度熵的问题,所以我们使用这些熵来测试广义第二定律(GSL)的引力热力学在这个框架。虽然我们发现,原来的李的模型通过GSL测试的一个特殊的选择参数,在一个饱和的模型与选择的形式的哈勃参数的IR截止,GSL总是打破。

英文摘要:

Classical and quantum entropic properties of holographic dark energy (HDE) are considered in view of the fact that its entropy is far more restrictive than the entropy of a black hole of the same size. In cosmological settings (in which HDE is promoted to a plausible candidate for being the dark energy of the universe), HDE should be viewed as a combined state composed of the event horizon and the stuff inside the horizon. By any interaction of the subsystems, the horizon and the interior become entangled, raising thereby a possibility that their quantum correlations be responsible for the almost purity of the combined state. Under this circumstances, the entanglement entropy is almost the same for both subsystems, being also of the same order as the thermal (coarse grained) entropy of the interior or the horizon. In the context of thermodynamics, however, only additive coarse grained entropies matter, so we use these entropies to test the generalized second law (GSL) of gravitational thermodynamics in this framework. While we find that the original Li's model passes the GSL test for a special choice of parameters, in a saturated model with the choice for the IR cutoff in the form of the Hubble parameter, the GSL always breaks down.

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。

↑