Entropy production due to adiabatic particle creation in a holographic dissipative cosmology
Entropy production due to adiabatic particle creation in a holographic dissipative cosmology
复制标题
DOI：
10.1103/physrevd.102.063512
复制
发表时间：
2020-06
影响因子：
5
通讯作者：
N. Komatsu
中科院分区：
文献类型：
--
作者：
N. Komatsu
宇宙绝热粒子的产生导致不可逆熵的产生。不可逆熵的演化最近在平坦的弗里德曼-罗伯逊-沃克宇宙中进行了研究，使用带有幂律项的耗散模型（与哈勃参数 $H$ 的幂成正比）。在耗散宇宙中，哈勃体积中包含的不可逆熵与 $H^{-1}$ 成正比，这与宇宙地平线上的贝肯斯坦-霍金熵不同。此外，还研究了视界熵的演化，扩展了之前对非耗散宇宙的分析[Phys. Rev. D 100, 123545 (2019) (arXiv:1911.08306)]。在本模型中，总是满足广义热力学第二定律，而在特定条件下满足熵最大化。耗散宇宙应该受到熵最大化的约束，就好像宇宙表现为一个普通的、孤立的宏观系统一样。
Cosmological adiabatic particle creation results in the generation of irreversible entropy. The evolution of the irreversible entropy is examined in a flat Friedmann--Robertson--Walker universe at late times, using a dissipative model with a power-law term (proportional to the power of the Hubble parameter $H$). In a dissipative universe, the irreversible entropy included in the Hubble volume is found to be proportional to $H^{-1}$, unlike for the Bekenstein--Hawking entropy on the horizon of the universe. In addition, the evolution of the horizon entropy is examined, extending the previous analysis of a non-dissipative universe [Phys. Rev. D 100, 123545 (2019) (arXiv:1911.08306)]. In the present model, the generalized second law of thermodynamics is always satisfied, whereas the maximization of entropy is satisfied under specific conditions. The dissipative universe should be constrained by the entropy maximization as if the universe behaves as an ordinary, isolated macroscopic system.