On warped string vacuum profiles and cosmologies. Part II. Non-supersymmetric strings

A bstract We investigate the effects of leading tadpole potentials 10D tachyon-free non-supersymmetric strings in warped products flat geometries type M p +1 × R T 10 ?p? 2 depending on a single coordinate. In absence fluxes and for < 8, there are two families these vacua orientifold disk-level potential, both involving finite internal interval. Their asymptotics surprisingly captured by tadpole-free solutions, isotropic one family anisotropic at end other. contrast, heterotic torus-level potential four types vacua. always tadpole-dependent lying distance, while other end, which can lie or infinite they be anisotropic. then elaborate general setup including symmetric fluxes, present three exact solutions that emerge when seven-form flux present. These include pair boundaries, separated distance. neighborhood one, all approach common supersymmetric limit, boundary isotropic, again supersymmetric. also discuss corresponding cosmologies, with emphasis their climbing descending behavior initial singularity. some cases toroidal dimensions contract during cosmological expansion.