%0 Journal Article
%T Construction of String Solutions around Non-trivial Backgrounds
%A Costas Kounnas
%J Physics
%D 1993
%I arXiv
%X We present a way of constructing string solutions around non-trivial gravitational backgrounds. The proposed solutions are constructed using $N = 4$ superconformal building blocks with $\hat c = 4$. We give two different and inequivalent realizations of non-trivial four-dimensional subspaces, and we show the emergence of the $N = 4$ globally defined superconformal symmetry. The existence of $N = 4$ world-sheet symmetry stabilizes our solutions and implies in target space a number of covariantized supersymmetries around space-time dependent gravitational and dilaton backgrounds.
%U http://arxiv.org/abs/hep-th/9302058v1