A class of non-supersymmetric open string vacua

Abstract We analyze non-supersymmetric four-dimensional open string models of type IIB string theory compactified on T2×K3 with Scherk–Schwarz deformation acting on an S1 of the T2 torus. We find that there are always two solutions to the tadpole conditions that are shown to be connected via Wilson lines in an non-trivial way. These models although non-supersymmetric, are free of R–R and NS–NS tadpoles.