Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stochastic Tachyon Fluctuations, Marginal Deformations and Shock Waves
  in String Theory   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).

17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph