标题： 字符串宇宙学的镜像图像 显示英文标题

标题： Mirror Images of String Cosmologies

摘要： 一种四维弦有效作用的离散对称性被用来从广义相对论中具有两个对易类空Killing矢量的真空解推导出空间均匀和非均匀的弦宇宙学模型。 特别是，从一个真空类型VI_h解生成了一个倾斜的Bianchi类型V宇宙学，从一个类型${\rm VII}_h$模型中找到了具有有界且振荡的标量场的平面波解。 进一步的应用被简要讨论。 显示英文摘要

摘要： A discrete symmetry of the four-dimensional string effective action is employed to derive spatially homogeneous and inhomogeneous string cosmologies from vacuum solutions of general relativity that admit two commuting spacelike Killing vectors. In particular, a tilted Bianchi type V cosmology is generated from a vacuum type VI_h solution and a plane wave solution with a bounded and oscillating dilaton field is found from a type ${\rm VII}_h$ model. Further applications are briefly discussed.