Non-local SFT Tachyon and Cosmology

Details Non-local SFT Tachyon and Cosmology Non-local SFT Tachyon and Cosmology

2007-01-10

arxiv.org/abs/hep-th/0701103v2

JHEP 0704:029,2007

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, LaTeX; v2: JHEP3 class is used, references added

Scientific paper

10.1088/1126-6708/2007/04/029

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.

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