Inference of boundaries in causal sets
Inference of boundaries in causal sets
复制标题
因果集中边界的推断
DOI:
10.1088/1361-6382/aaadc4
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发表时间:
2018
影响因子:
3.5
通讯作者:
Cunningham, William J
中科院分区:
文献类型:
--
作者:
Cunningham, William J
We investigate the extrinsic geometry of causal sets in (1+ 1)-dimensional Minkowski spacetime. The properties of boundaries in an embedding space can be used not only to measure observables, but also to supplement the discrete action in the partition function via discretized Gibbons–Hawking–York boundary terms. We define several ways to represent a causal set using overlapping subsets, which then allows us to distinguish between null and nonnull bounding hypersurfaces in an embedding space. We discuss algorithms to differentiate between different types of regions, consider when these distinctions are possible, and then apply the algorithms to several spacetime regions. Numerical results indicate the volumes of timelike boundaries can be measured to within 0.5% accuracy for flat boundaries and within 10% accuracy for highly curved boundaries for medium-sized causal sets with N= 214 spacetime elements.
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DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Maria Teofilo Benincasa
通讯作者:
Maria Teofilo Benincasa
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
D. Meyer
通讯作者:
D. Meyer
影响因子:
3.5
作者:
S. Major;D. Rideout;S. Surya
通讯作者:
S. Major;D. Rideout;S. Surya
影响因子:
3.5
作者:
L. Glaser
通讯作者:
L. Glaser
影响因子:
2.1
作者:
F. Gavril
通讯作者:
F. Gavril