Viscous cosmologies in scalar-tensor theories for Kasner type metrics

被引:4
作者
Cataldo, M
del Campo, S
Salgado, P
机构
[1] Univ Bio Bio, Fac Ciencias, Dept Fis, Concepcion, Chile
[2] Pontificia Univ Catolica Valparaiso, Fac Ciencias Basicas & Matemat, Inst Fis, Valparaiso, Chile
[3] Univ Concepcion, Fac Ciencias Fis & Matemat, Dept Fis, Concepcion, Chile
关键词
D O I
10.1103/PhysRevD.63.063503
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In a viscous Bianchi type-I metric of the Kasner form, it is well known that it is not possible to describe an anisotropic physical model of the universe, which satisfies the second law of thermodynamics and the dominant energy condition in Einstein's theory of gravity. We examine this problem in scalar-tensor theories of gravity. In this theory we show that it is possible to describe the growth of entropy, keeping the thermodynamics and the dominant energy condition.
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页数:6
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