期刊
PHYSICAL REVIEW D
卷 104, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.084072
关键词
-
资金
- Basic Research Program of the Science, Technology and Innovation Commission of Shenzhen Municipality [JCYJ20180302174206969]
The higher-derivative curvature invariants serve as a quantum selection mechanism for regular spacetimes in quantum gravity theory. Some regular spacetimes may not contribute to the path integral due to the presence of singular higher-derivative curvature invariants.
We elaborate on the role of higher-derivative curvature invariants as a quantum selection mechanism of regular spacetimes in the framework of the Lorentzian path integral approach to quantum gravity. We show that for a large class of black hole metrics prominently regular there are higher-derivative curvature invariants which are singular. If such terms are included in the action, according to the finite action principle applied to a higher-derivative gravity model, not only singular spacetimes but also some of the regular ones do not seem to contribute to the path integral.
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