Fuzzy CP2 spacetimes

被引：7
|
作者：
Chaney, A. [1 ]
Stern, A. [1 ]
机构：
[1] Univ Alabama, Dept Phys, Tuscaloosa, AL 35487 USA
来源：
PHYSICAL REVIEW D | 2017年 / 95卷 / 04期
关键词：
GAUGE-THEORY; SIGNATURE CHANGE; TOPOLOGY;
D O I：
10.1103/PhysRevD.95.046001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Four-dimensional manifolds with changing signature are obtained by taking the large N limit of fuzzy CP2 solutions to a Lorentzian matrix model. The regions of Lorentzian signature give toy models of closed universes which exhibit cosmological singularities. These singularities are resolved at finite N, as the underlying CP2 solutions are expressed in terms of finite matrix elements.
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页数：8
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