期刊
PHYSICS LETTERS B
卷 619, 期 3-4, 页码 201-207出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2005.06.008
关键词
-
It is demonstrated by explicit solutions of the (4 + n)-dimensional vacuum Einstein equations that accelerating cosmologies in the Einstein conformal frame can be obtained by a time-dependent compactification of string/M-theory, even in the case that internal dimensions are Ricci-flat, provided one includes one or more geometric twists. Such acceleration is transient. When both compact hyperbolic internal spaces and geometric twists are included, however, the period of accelerated expansion may be made arbitrarily large. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据