期刊
PHYSICS LETTERS B
卷 695, 期 1-4, 页码 317-319出版社
ELSEVIER
DOI: 10.1016/j.physletb.2010.10.060
关键词
Asymptotic safety; Gravitational collapse; Gravitational singularities
资金
- INFN [BO11]
- Department of Energy [DE-FG02-96ER40969]
Asymptotic safety (an ultraviolet fixed point with finite-dimensional critical surface) offers the possibility that a predictive theory of quantum gravity can be obtained from the quantization of classical general relativity. However, it is unclear what becomes of the singularities of classical general relativity, which, it is hoped, might be resolved by quantum effects. We study dust collapse with a running gravitational coupling and find that a future singularity can be avoided if the coupling becomes exactly zero at some finite energy scale. The singularity can also be avoided (pushed off to infinite proper time) if the coupling approaches zero sufficiently rapidly at high energies. However, the evolution deduced from perturbation theory still implies a singularity at finite proper time. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据