Dynamics in nonlocal cosmological models derived from string field theory

被引：65
作者：
Joukovskaya, Liudmila [1 ]
机构：
[1] Univ Cambridge, Ctr Math Sci, DAMTP, Cambridge CB3 0WA, England
来源：
PHYSICAL REVIEW D | 2007年 / 76卷 / 10期
关键词：
D O I：
10.1103/PhysRevD.76.105007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A general class of nonlocal cosmological models is considered. A new method for solving nonlocal Friedmann equations is proposed, and solutions of the Friedmann equations with nonlocal operator are presented. The cosmological properties of these solutions are discussed. Especially indicated is the p-adic cosmological model in which we have obtained a nonsingular bouncing solution and string field theory tachyon model in which we have obtained full solution of nonlocal Friedmann equations with w=-1 at large times. The possibility of obtaining a realistic value of the cosmological constant from nonlocal cosmological models is also discussed.
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页数：12
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