Bogomol'nyi bound with a cosmological constant

被引：3
|
作者：
Kim, Y [1 ]
Kimm, K
机构：
[1] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea
[2] Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea
来源：
PHYSICAL REVIEW D | 1998年 / 58卷 / 10期
关键词：
D O I：
10.1103/PhysRevD.58.107701
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A Bogomol'nyi-type bound is constructed for topological solitons in the O(3) nonlinear sigma model coupled to gravity with a negative cosmological constant. Spacetimes made by self-dual solutions form a class of Godel-type universes. We also show that static Nielsen-Olesen vortices saturate the Bogomol'nyi-type bound only when the cosmological constant vanishes. [S0556-2821(98)03220-2].
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页数：4
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