Anisotropic homogeneous string cosmology with two-loop corrections

被引：7

作者：

Naderi, F. ^{[1
]}

Rezaei-Aghdam, A. ^{[1
]}

机构：

[1] Azarbaijan Shahid Madani Univ, Fac Basic Sci, Dept Phys, Tabriz 53714161, Iran

来源：

NUCLEAR PHYSICS B | 2017年 / 923卷

关键词：

GRACEFUL EXIT PROBLEM; SIGMA-MODEL; BLACK-HOLES; SYMMETRIES; DILATON;

D O I：

10.1016/j.nuclphysb.2017.08.005

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The two-loop (order alpha') beta-function equations, which are equivalent to the equations of motion of alpha'-corrected string effective action, are considered for anisotropic homogeneous space-times. These equations are solved for all Bianchi-type models in two schemes of effective action, namely R-2 and Gauss-Bonnet schemes with zero cosmological constant and then the metric, dilaton and B-field are found at alpha' perturbative corrections. (C) 2017 The Author(s). Published by Elsevier B.V.

引用

页码：416 / 457

页数：42