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arXiv 1509.08899gr-qc
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圈量子宇宙学的广义有效描述

Generalized effective description of loop quantum cosmology

Abhay Ashtekar, Brajesh Gupt

摘要:

圈量子宇宙学(LQC)的有效描述已被证明是一个方便的平台来研究解决经典大爆炸奇点的量子反弹的唯象意义。最初,这种描述是使用具有小色散的高斯量子态导出的。在本文中,我们提出了一个推广,将大分散状态。具体来说,我们推导出\emph{generalized}有效的弗里德曼和Raychaudhuri方程,并提出了一个广义的有效哈密顿量,这是正在进行的研究中的现象学后果的广泛的一类量子几何。我们还讨论了一个有趣的物理状态之间的相互作用,在标准的LQC较大的分散体,和尖锐的峰值状态(假设)LQC理论与较大的面积差距。

英文摘要:

The effective description of loop quantum cosmology (LQC) has proved to be a convenient platform to study phenomenological implications of the quantum bounce that resolves the classical big-bang singularity. Originally, this description was derived using Gaussian quantum states with small dispersions. In this paper we present a generalization to incorporate states with large dispersions. Specifically, we derive the \emph{generalized} effective Friedmann and Raychaudhuri equations and propose a generalized effective Hamiltonian which are being used in an ongoing study of the phenomenological consequences of a broad class of quantum geometries. We also discuss an interesting interplay between the physics of states with larger dispersions in standard LQC, and of sharply peaked states in (hypothetical) LQC theories with larger area gap.

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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