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arXiv 1508.03069gr-qcastro-ph.COhep-th
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通过非最小曲率-物质耦合的不可逆物质创造过程

Irreversible matter creation processes through a nonminimal curvature-matter coupling

Francisco S. N. Lobo, Tiberiu Harko, José P. Mimoso, Diego Pavón

摘要:

Prigogine { \it et al.}提出了一个有趣的宇宙学历史。他认为宇宙是一个开放的系统这种情况的特点是一个过程的物质创造,这对应于一个不可逆的能量流从引力场的无压物质流体。在这里,我们表明,引力诱导粒子的生产可能会出现从一个非最小曲率物质耦合。通过考虑等效标量张量理论,讨论了该模型的宇宙学意义。由于所有已知的自然系统都趋向于热力学平衡状态,并且假设宇宙在这方面没有什么不同,我们还讨论了达到平衡态的条件。

英文摘要:

An interesting cosmological history was proposed by Prigogine {\it et al.} who considered the Universe as a thermodynamically open system. This scenario is characterized by a process of matter creation, which corresponds to an irreversible energy flow from the gravitational field to the pressureless matter fluid. Here, we show that the gravitationally induced particle production may arise from a nonminimal curvature-matter coupling. By considering the equivalent scalar-tensor theory, the cosmological implications of the model are discussed. As all known natural systems tend to a state of thermodynamic equilibrium, and assuming the universe is not different in this respect, we also discuss the conditions to attain the equilibrium state.

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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