Causal Dynamical Triangulations without preferred foliation
Causal Dynamical Triangulations without preferred foliation
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DOI:
10.1016/j.physletb.2013.06.007
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发表时间:
2013-05
影响因子:
4.4
通讯作者:
S. Jordan;R. Loll;R. Loll
中科院分区:
文献类型:
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作者:
S. Jordan;R. Loll;R. Loll
We introduce a generalized version of the Causal Dynamical Triangulations (CDT) formulation of quantum gravity, in which the regularized, triangulated path integral histories maintain their causal properties, but do not have a preferred proper-time foliation. An extensive numerical study of the associated nonperturbative path integral in 2+1 dimensions shows that it can nevertheless reproduce the emergence of an extended de Sitter universe on large scales, a key feature of CDT quantum gravity. This suggests that the preferred foliation normally used in CDT is not a crucial (albeit convenient) part of its background structure.