Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-06-09
Helv.Phys.Acta 67:884-922,1994
Physics
High Energy Physics
High Energy Physics - Theory
42 pages, harvmac, review in Helvetica Physica Acta
Scientific paper
In this review I discuss various aspects of some of the recently constructed black hole and soliton solutions in string theory. I begin with the axionic instanton and related solutions of bosonic and heterotic string theory. The latter ten-dimensional solutions can be compactified to supersymmetric monopole, string and domain wall solutions which break $1/2$ of the spacetime supersymmetries of $N=4, D=4$ heterotic string theory, and which can be generalized to two-parameter charged black hole solutions. The low-energy dynamics of these solutions is also discussed, as well as their connections with strong/weak coupling duality and target space duality in string theory. Finally, new solutions are presented which break $3/4, 7/8$ and all of the spacetime supersymmetries and which also arise in more realistic $N=1$ and $N=2$ compactifications.
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