arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.01744gr-qchep-th
收藏

圈量子宇宙学的无边界波函数

The no-boundary wave function for loop quantum cosmology

Suddhasattwa Brahma, Dong-han Yeom

摘要:

提出光滑初始条件是量子宇宙学的重要任务之一。另一方面,由于特定的量子引力方案,出现在半经典路径积分中的低能有效作用量可以在经典奇点附近得到非平凡的量子修正。在这篇文章中,我们结合了著名的无边界提议的波函数的宇宙与量子修改来自圈量子宇宙学(LQC)。值得注意的是,我们发现,在原来的Hartle-Hawking建议的限制的“慢卷”型潜力是相当宽松的,由于量子几何正则化。有趣的是,在LQC中导致奇异性分辨率的相同效应也最终扩大了光滑初始条件的允许空间,导致暴胀宇宙。

英文摘要:

Proposing smooth initial conditions is one of the most important tasks in quantum cosmology. On the other hand, the low-energy effective action, appearing in the semiclassical path integral, can get nontrivial quantum corrections near classical singularities due to specific quantum gravity proposals. In this article, we combine the well-known no-boundary proposal for the wavefunction of the universe with quantum modifications coming from loop quantum cosmology (LQC). Remarkably, we find that the restriction of a `slow-roll' type potential in the original Hartle-Hawking proposal is considerably relaxed due to quantum geometry regularizations. Interestingly, the same effects responsible for singularity-resolution in LQC also end up expanding the allowed space of smooth initial conditions leading to an inflationary universe.

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。

↑