On string cosmology and the RG flow in 2d field theory

Details On string cosmology and the RG flow in 2d field theory On string cosmology and the RG flow in 2d field theory

1994-04-29

arxiv.org/abs/hep-th/9404180v3

Nucl.Phys.B426:187-202,1994

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, Latex, BUTP-94/7, Imperial/TP/93-94/29 (some footnotes and references added.)

Scientific paper

10.1016/0550-3213(94)90131-7

Time-dependent solutions of bosonic string theory resemble renormalisation group trajectories in the space of 2d field theories: they often interpolate between repulsive and attractive static solutions. It is shown that the attractive static solutions are those whose spatial sections are minima of |\bar c-25|, where \bar c is the `c-function'. The size of the domain of attraction of such a solution may be a measure of the probability of the corresponding string vacuum. Our discussion has also an implication for the RG flow in theories coupled to dynamical 2d gravity: the flow from models with c>25 to models with c<25 is forbidden.

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