Nonlocal string theories on AdS 3 ×S 3 and stable nonsupersymmetric backgrounds

摘要: We exhibit a simple class of exactly marginal ``double-trace'' deformations two-dimensional conformal field theories (CFTs) which have ${\mathrm{AdS}}_{3}$ duals, in the deformation is given by product left- and right-moving U(1) currents. In this special case on generated local boundary term three dimensions, changes physics also bulk via bulk-boundary propagators. However, nonlocal six dimensions string world sheet, as generic theories. Because simplicity we can explicitly make computations theory compare them to CFT computations, obtain precise agreement. discuss effect closed strings D branes. The examples analyze include supersymmetry-breaking but deformation, dual no destabilizing tadpoles are for moduli nonperturbatively all couplings, despite absence supersymmetry. explain how cancellation works gravity side perturbation theory, at leading order parameter. possible flat space limits our construction.