Brane gas cosmology in M theory: Late time behavior

被引:52
作者
Easther, R [1 ]
Greene, BR
Jackson, MG
Kabat, D
机构
[1] Columbia Univ, Inst Strings Cosmol & Astroparticle Phys, New York, NY 10027 USA
[2] Columbia Univ, Dept Math, New York, NY 10027 USA
[3] Columbia Univ, Dept Phys, New York, NY 10027 USA
来源
PHYSICAL REVIEW D | 2003年 / 67卷 / 12期
关键词
D O I
10.1103/PhysRevD.67.123501
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the late-time behavior of a universe containing a supergravity gas and wrapped 2-branes in the context of M theory compactified on T-10. The supergravity gas tends to drive uniform expansion, while the branes impede the expansion of the directions about which they are wrapped. Assuming spatial homogeneity, we study the dynamics both numerically and analytically. At late times the radii obey power laws which are determined by the brane wrapping numbers, leading to interesting hierarchies of scale between the wrapped and unwrapped dimensions. The biggest hierarchy that could evolve from an initial thermal fluctuation produces three large unwrapped dimensions. We also study configurations corresponding to string winding, in which the M2-branes are all wrapped around the (small) 11th dimension, and show that this recovers the scenario discussed by Brandenberger and Vafa.
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页数:10
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