Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-03-27
Phys.Rev. D55 (1997) 6394-6402
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, section 5 replaced by 5 and 6, references added; to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.55.6394
We compute the exact string vacuum backgrounds corresponding to the non-compact coset theory $SU(2,1)/SU(2)$. The conformal field theory defined by the level $k= 4$ results in a five dimensional singular solution that factorizes in an asymptotic region as the linear dilaton solution and a $S^3$ model. It presents two abelian compact isometries that allow to reinterpreting it from a four dimensional point of view as a stationary and magnetically charged space-time resembling in some aspects the Kerr-Newman solution of general relativity. The $k=\frac{13}{7}$ theory on the other hand describes a cosmological solution that interpolates between a singular phase at short times and a $S^1 \times S^2$ universe after some planckian times.
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