arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.05037gr-qc
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具有$g$ -本质的宇宙Einstein-Maxwell模型

Cosmological Einstein-Maxwell model with $g$-essence

O. Razina, P. Tsyba, B. Meirbekov, R. Myrzakulov

摘要:

本文研究了具有均匀、各向同性和平坦Friedmann-Robertson-Walker度规的晚期宇宙模型,其中引力场的源是费米子场和玻色子场,麦克斯韦项是四维的$F_{μν}F^{μν} $。爱因斯坦引力的麦克斯韦项的驱动使得有可能找到新的方法来解决观测到的宇宙加速膨胀的问题。能量条件已获得和研究。这些条件对能量密度和压力的行为施加了非常简单和与模型无关的限制,因为它们不需要特定的物质状态方程。为了考虑该模型,能量条件NEC,WEC,DEC被实现,并且SEC条件被违反。玻色子和费米子场在早期是加速状态的原因,但由于总压在很长一段时间内趋于零,因此会发生向减速状态的过渡。麦克斯韦场只是在早期才是至关重要的。

英文摘要:

In this paper, we study the model of the late universe with the homogeneous, isotropic and flat Friedmann-Robertson-Walker metric, where the source of the gravitational field is based on the fermion and boson field, with the Maxwell term $F_{μν}F^{μν} $ in four dimensions. The actuation of the Maxwell term for the Einstein gravity makes it possible to find new approaches to solve the problem of the observed accelerated expansion of the universe. Energy conditions have been obtained and studied. These conditions impose very simple and model-independent restrictions on the behaviour of energy density and pressure since they do not require a specific equation of state of matter. To consider the model, the energy conditions NEC, WEC, DEC are realized, and the SEC condition is violated. The boson and fermion fields are responsible for the accelerated regime at early times, but since the total pressure is tending toward zero for large times, a transition to a decelerated regime occurs. Maxwell field is crucial only in the early times.

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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