• DOI:10.1103/PhysRevD.54.6424
• Corpus ID: 37889

Solitons of axion-dilaton gravity.

@article{Bakas1996SolitonsOA,
  title={Solitons of axion-dilaton gravity.},
  author={Bakas},
  journal={Physical review. D, Particles and fields},
  year={1996},
  volume={54 10},
  pages={
          6424-6434
        }
}

• Bakas
• Published 7 May 1996
• Physics
• Physical review. D, Particles and fields

We use soliton techniques of the two-dimensional reduced {beta}-function equations to obtain nontrivial string backgrounds from flat space. These solutions are characterized by two integers ({ital n},{ital m}) referring to the soliton numbers of the metric and axion-dilaton sectors, respectively. We show that the Nappi-Witten universe associated with the SL(2){times}SU(2)/SO(1,1){times}U(1) CFT coset arises as a (1,1) soliton in this fashion for certain values of the moduli parameters, while for other values of the soliton moduli we arrive at the SL(2)/SO(1,1){times}SO(1,1){sup 2} background. Ordinary four-dimensional black holes arise as two-dimensional (2,0) solitons, while the Euclidean wormhole background is described as a (0,2) soliton on flat space. The soliton transformations correspond to specific elements of the string Geroch group. These could be used as a starting point for exploring the role of {ital U} dualities in string compactifications to two dimensions. {copyright} {ital 1996 The American Physical Society.}