FRW宇宙中Umami Chaubergin气体相互作用的相空间分析和热力学
Phase Space Analysis and Thermodynamics of Interacting Umami Chaplygin gas in FRW Universe
摘要：
本文在平坦FRW宇宙模型中研究了相互作用的Umami Chaubergin气体的热力学和动力学行为。特别地，考虑到Umami流体作为暗能量与暗物质相互作用，在两种不同的情况下，研究了视视界和事件视界作为边界视界的不可逆热力学。通过将宇宙演化方程转化为一个自治的常微分方程组，在动力系统分析的范围内对该模型进行了研究。通过对模型参数$ω$和耦合参数$λ$的一些限制，发现了一些描述宇宙在宇宙学常数和加速标度吸引子的吸引下在精粹时代晚期加速演化的宇宙学上有趣的临界点，以缓解符合问题.
英文摘要：
In this work interacting Umami Chaplygin gas has been studied in flat FRW model of universe in context of it's thermodynamic and dynamical behaviour. In particular, considering Umami fluid as dark energy interacting with dark matter, irreversible thermodynamics has been studied both for apparent and event horizon as bounding horizon in two separate cases. Also the model has been investigated in purview of dynamical systems analysis by converting the cosmological evolution equations to an autonomous system of ordinary differential equations. With some restrictions on model parameter $ω$ and coupling parameter $λ$, some cosmologically interesting critical points describing late time accelerated evolution of the universe attracted by cosmological constant and accelerated scaling attractor in quintessence era have been found to alleviate coincidence problem.
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