Thoughts on Tachyon Cosmology

Details Thoughts on Tachyon Cosmology Thoughts on Tachyon Cosmology

2003-01-16

arxiv.org/abs/hep-th/0301117v1

Class.Quant.Grav.20:S321-S346,2003

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, no figures. This is the written version of a lecture delivered at the Workshop on the Quantum Structure of Spacetime

Scientific paper

10.1088/0264-9381/20/12/301

After a pedagogical review of elementary cosmology, I go on to discuss some obstacles to obtaining inflationary or accelerating universes in M/String Theory. In particular, I give an account of an old No-Go Theorem to this effect. I then describe some recent ideas about the possible r\^ole of the tachyon in cosmology. I stress that there are many objections to a naive inflationary model based on the tachyon, but there remains the possiblity that the tachyon was important in a possible pre-inflationary Open-String Era preceding our present Closed String Era.

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