Stable Non-Supersymmetric Vacua in the Moduli Space of Non-Critical Superstrings

TL;DR

This paper explores asymmetric deformations of non-critical superstring theories, resulting in non-supersymmetric vacua with stable spectra and no tachyons, and analyzes their holographic duals and one-loop effects.

Contribution

It introduces a new class of non-critical superstring vacua with broken supersymmetry and stable spectra, expanding understanding of string theory landscapes.

Findings

No bulk or localized tachyons in the deformed vacua

Stable non-supersymmetric solutions in supergravity

Insights into one-loop cosmological constant effects

Abstract

We study a set of asymmetric deformations of non-critical superstring theories in various dimensions. The deformations arise as Kaehler and complex structure deformations of an orthogonal two-torus comprising of a parallel and a transverse direction in the near-horizon geometry of NS5-branes. The resulting theories have the following intriguing features: Spacetime supersymmetry is broken in a continuous fashion and the masses of the lightest modes are lifted. In particular, no bulk or localized tachyons are generated in the non-supersymmetric vacua. We discuss the effects of these deformations in the context of the holographic duality between non-critical superstrings and Little String Theories and find solutions of rotating fivebranes in supergravity. We also comment on the generation of a one-loop cosmological constant and determine the effects of the one-loop backreaction to leading order.