Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-12-30
Nucl.Phys.B547:427-470,1999
Physics
High Energy Physics
High Energy Physics - Theory
33 pages, LaTeX, Bonne Ann\'ee
Scientific paper
10.1016/S0550-3213(99)00093-0
The Geroch group, isomorphic to the SL(2,R) affine Kac-Moody group, is an infinite dimensional solution generating group of Einstein's equations with two surface orthogonal commuting Killing vectors. We introduce another solution generating group for these equations, the dressing group, and discuss its connection with the Geroch group. We show that it acts transitively on a dense subset of moduli space. We use a new Lax pair expressing a twisted self-duality of this system and we study the dressing problem associated to it. We also describe how to use vertex operators to solve the reduced Einstein's equations. In particular this allows to find solutions by purely algebraic computations.
Bernard Denis
Julia Bernard
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