Stochastic Tachyon Fluctuations, Marginal Deformations and Shock Waves in String Theory

Details Stochastic Tachyon Fluctuations, Marginal Deformations and Shock Waves in String Theory Stochastic Tachyon Fluctuations, Marginal Deformations and Shock Waves in String Theory

1994-12-07

arxiv.org/abs/hep-th/9412065v3

Phys.Rev. D52 (1995) 2323-2332

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, harvmac, no figures. Very minor modifications, and in addition conditions (B.3) and (B.4) were also obtained using b

Scientific paper

10.1103/PhysRevD.52.2323

Starting with exact solutions to string theory on curved spacetimes we obtain deformations that represent gravitational shock waves. These may exist in the presence or absence of sources. Sources are effectively induced by a tachyon field that randomly fluctuates around a zero condensate value. It is shown that at the level of the underlying conformal field theory (CFT) these deformations are marginal and moreover all \a'-corrections are taken into account. Explicit results are given when the original undeformed 4-dimensional backgrounds correspond to tensor products of combinations of 2-dimensional CFT's, for instance SL(2,R)/R \times SU(2)/U(1).

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