O(D, D)-COVARIANT STRING COSMOLOGY

被引：168
作者：
GASPERINI, M
VENEZIANO, G
机构：
[1] IST NAZL FIS NUCL,SEZ TORINO,I-10125 TURIN,ITALY
[2] CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND
来源：
PHYSICS LETTERS B | 1992年 / 277卷 / 03期
关键词：
D O I：
10.1016/0370-2693(92)90744-O
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recently discovered O(d, d) symmetry of the space of (slowly-varying) cosmological string vacua in d + 1 dimensions is shown to be preserved in the presence of bulk string matter. The existence of 0(d, d) conserved currents allows all the equations of string cosmology to be reduced to first-order differential equations. The perfect-fluid approximation is not invariant under O(d, d) transformations, implying that stringy fluids possess in general a non-vanishing viscosity.
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页码：256 / 264
页数：9
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