Brans-Dicke宇宙中广义鬼场暗能量的演化及其热力学性质

发布时间：2018-04-13 00:16

本文选题：宇宙加速膨胀 + 暗能量　；参考：《辽宁师范大学》2016年硕士论文

【摘要】：最近几年的天文观测表明:当前的宇宙正处在加速膨胀时期。解释何为驱动宇宙加速膨胀的源动力,已经成为当今宇宙学的热点问题。为解释这一现象,目前人们提出的多种理论中,最好的还属暗能量理论。虽然现有的暗能量模型有很多种,例如宇宙学常数模型,但各自都存在优缺点。本文在Brans-Dicke引力框架下,深入研究了广义鬼场暗能量(GGDE)模型中各个宇宙学量的演化,之后,讨论了有三种相互作用形式和有粘滞性时,暗能量态参数wde、有效态参数weff和减速参数q的演化规律。通过分析发现,与三种相互作用相对应的暗能量态参数wde和有效态参数weff均可实现Phantom边界的穿越。而当我们固定相互作用形式时,粘滞效应将延缓态参数穿越-1。最后,在上述基础上,讨论了 Brans-Dicke引力框架下带有粘滞性的有相互作用的广义鬼场暗能量模型的热力学性质及熵的修正,同时也得到了暗能量相互作用项与热力学涨落之间的关系。
[Abstract]:Show that the astronomical observations in recent years: the universe is in a period of accelerated expansion. What is the source of power to drive the accelerated expansion of the universe, has become a hot issue in cosmology. To explain this phenomenon, many people put forward in theory at present, the best is the dark energy theory. Although the existing models of dark energy there are many, such as the cosmological constant model, but they have respective advantages and disadvantages. Based on the Brans-Dicke gravity framework, in-depth study of the generalized ghost field dark energy (GGDE) after the evolution, various cosmological quantities in the model, discusses the interaction of three forms and a viscous, dark energyparameters wde, effective the state parameters weff and Q of the deceleration parameter evolution law. Through the analysis, corresponding to the interaction of three dark energyparameters wde and available weff parameters can realize the Phantom border crossing. And when I Have fixed form of interaction, the viscous effect will delay state parameters through -1.. Finally, on the basis of the above discussion, the attraction of Brans-Dicke under the framework of generalized ghost field interacting with viscosity and thermodynamic properties of the entropy of the dark energy model correction, but also by the relationship between dark energy interactions and thermal fluctuation.

【学位授予单位】：辽宁师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P159

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