Non-local SFT tachyon and cosmology

被引:57
作者
Koshelev, Alexey S. [1 ]
机构
[1] Univ Crete, Dept Phys, POB 2208, Iraklion 71003, Greece
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 04期
关键词
string field theory; cosmology of theories beyond the SM;
D O I
10.1088/1126-6708/2007/04/029
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Cosmological scenarios built upon the generalized non-local String Field Theory and p-adic tachyons are examined. A general kinetic operator involving an infinite number of derivatives is studied as well as arbitrary parameter p. The late time dynamics of just the tachyon around the non-perturbative vacuum is shown to leave the cosmology trivial. A late time behavior of the tachyon and the scale factor of the FRW metric in the presence of the cosmological constant or a perfect fluid with w > -1 is constructed explicitly and a possibility of non-vanishing oscillations of the total effective state parameter around the phantom divide is proven.
引用
收藏
页数:19
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