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arXiv 1503.08284gr-qc
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具有相互作用流体的涌现宇宙与广义热力学第二定律

Emergent Universe with Interacting fluids and Generalized Second Law of Thermodynamics

B. C. Paul, A. S. Majumdar

摘要:

我们调查的紧急宇宙的情况下,存在相互作用的流体。在广义相对论中,为获得突现宇宙而考虑的非线性状态方程实际上是一个三流体组成的宇宙学模型。在本文中,我们考虑两个模型来实现可行的宇宙学场景,{ \it即},(i)一个两流体模型与相互作用的无压流体与流体的非线性EoS所需的紧急宇宙,以及(ii)三个流体模型与相互作用的三种流体起源于EoS的紧急宇宙。结果发现,不排除上述两种情况下,根据观察现实的宇宙学模型。我们进一步表明,广义热力学第二定律被发现持有良好的新兴宇宙与相互作用的流体。

英文摘要:

We investigate the emergent universe scenario in the presence of interacting fluids. The non-linear equation of state (EoS) considered in the general theory of relativity for obtaining emergent universe is effectively a cosmological model with a composition of three fluids. In this paper we consider two models to realize viable cosmological scenarios, {\it viz.}, (i) a two-fluid model with interaction of a pressureless fluid with the fluid having the non-linear EoS needed for the emergent universe, and (ii) a three-fluid model with interaction among the three fluids which originate from the EoS of the emergent universe. It is found that realistic cosmological models in accordance with observations are not ruled out for both the above cases. We further show that the generalized second law of thermodynamics is found to hold good in the emergent universe with interacting fluids.

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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