[1] Univ Vienna, Inst Theoret Phys, A-1090 Vienna, Austria
来源:
PHYSICAL REVIEW D
|
1998年
/
57卷
/
10期
关键词:
D O I:
10.1103/PhysRevD.57.6176
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We discuss spherically symmetric, static solutions to the SU(2) sigma model on de Sitter background. Despite its simplicity this model reflects many of the features exhibited by systems of nonlinear matter coupled to gravity; e.g., there exists a countable set of regular solutions with finite energy: All of the solutions show linear instability with the number of unstable modes increasing with energy.
机构:
Univ Fed Rural Rio de Janeiro, Dept Fis, Grp Fis Teor & Matemat Fis, Cx Postal 23851,BR 465 Km 7, BR-23890000 Seropedica, RJ, BrazilUniv Fed Rural Rio de Janeiro, Dept Fis, Grp Fis Teor & Matemat Fis, Cx Postal 23851,BR 465 Km 7, BR-23890000 Seropedica, RJ, Brazil
机构:
Univ Fed Rural Rio De Janeiro, Dept Fis, Grp Fis Teor & Matemat Fis, Cx Postal 23851,BR 465 Km 7, BR-23890000 Seropedica, RJ, BrazilUniv Fed Rural Rio De Janeiro, Dept Fis, Grp Fis Teor & Matemat Fis, Cx Postal 23851,BR 465 Km 7, BR-23890000 Seropedica, RJ, Brazil