We review some aspects of the dramatic consequences of supersymmetry breaking on
string vacua. In particular, we focus on the issue of vacuum stability in ten-dimensional string …

We propose to sharpen the weak gravity conjecture by the statement that, except for BPS
states in a supersymmetric theory, the gravitational force is strictly weaker than any electric …

Various holographic approaches to QCD in five dimensions are explored using input both
from the putative five-dimensional non-critical string theory as well as QCD. It is argued that …

The world volume theory on N regular and M fractional D3-branes at the conifold singularity
is a non-conformal N= 1 supersymmetric SU (N+ M)× SU (N) gauge theory. In previous work …

We consider non-supersymmetric large N orientifold field theories. Specifically, we discuss a
gauge theory with a Dirac fermion in the antisymmetric tensor representation. We argue that …

A bstract We study de Sitter configurations in ten-dimensional string models where
supersymmetry is either absent or broken at the string scale. To this end, we derive …

We construct non-supersymmetric $ AdS_3 $ solutions of the $\mathrm O (16)×\mathrm O
(16) $ heterotic string. Most of the backgrounds have a classical worldsheet definition but …

We suggest a new large-N c limit for multiflavor QCD. Since fundamental and two-index
antisymmetric representations are equivalent in SU (3), we have the option to define SU (N …

A bstract In this paper we study non-perturbative instabilities in Anti-de Sitter vacua arising
from flux compactifications of string models with broken supersymmetry. In the semi-classical …

We show that the γ i-deformation, which was proposed as candidate gauge theory for a non-
supersymmetric three-parameter deformation of the anti-de Sitter/conformal field theory …