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arXiv 2409.05077gr-qc
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Wheeler-DeWitt方程与晚期引力坍缩:因子排序和隧穿情形的效应

Wheeler-DeWitt equation and the late gravitational collapse: effects of factor ordering and the tunneling scenario

Davide Batic, Marek Nowakowski, Neelima Govind Kelkar

AI总结:

本文针对晚期引力坍缩建立WDW方程,分析密度量子化、奇点规避、因子排序及正宇宙学常数导致的视界隧穿。

摘要:

我们为晚期引力坍缩建立了Wheeler-DeWitt(WDW)方程。引力坍缩与膨胀/坍缩宇宙都可以在Robertson-Walker度规范围内加以描述,这一事实使相应的坍缩物质WDW方程成为一个无时间的Schrödinger方程。我们探究了这种方程的后果,发现密度以Planck密度为单位被量子化。除此之外,作为WDW方程解的波函数表明初始奇点得以避免。我们集中研究方程动能项中的不同因子排序,并说明在分离出一个指数拟设之后,如何构造进入解中的新多项式。这使我们能够得出结论:因子排序会改变解和解释的细节,但总体上在定性层面结果保持不变。我们还探讨了正宇宙学常数的效应。它提供了在宇宙学视界处出现隧穿情形的可能性。

英文摘要:

We set up the Wheeler-DeWitt (WDW) equation for late gravitational collapse. The fact that the gravitational collapse and the expanding/ collapsing universe can be described within the realm of the Robertson-Walker metric renders the corresponding WDW equation for collapsing matter a timeless Schrödinger equation. We explore the consequences of such an equation and find the density to be quantized in terms of the Planck density. Apart from that, the wave function as a solution of the WDW equation shows that the initial singularity is avoided. We concentrate on different factor orderings in the kinetic term of the equation and show how after splitting off an exponential ansatz, new polynomials entering the solution can be constructed. This enables us to conclude that the factor ordering changes the details of the solution and interpretation, but overall on a qualitative level the results remain the same. We also probe into the effects of a positive cosmological constant. It offers the possibility of a tunneling scenario at the cosmological horizon.

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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