We study N f D6-brane probes in the supergravity background dual to N c D4-branes
compactified on a circle with supersymmetry-breaking boundary conditions. In the limit in …

We review various aspects of configurations of intersecting branes, including the conditions
for preservation of supersymmetry. In particular, we discuss the projection conditions on the …

This paper contains an overview of some recent attempts of understanding supergravity and
string duals of four-dimensional gauge theories using the AdS/CFT correspondence. The …

We study the effects produced by D-brane instantons on the holomorphic quantities of a D-
brane gauge theory at an orbifold singularity. These effects are not limited to reproducing the …

Abstract Following the analysis of [1], we calculate the spectrum of fluctuations of a probe Dk-
brane in the background of N Dp-branes, for k= p, p+ 2, p+ 4 and p< 5. The result …

We study systematically the open string modes of a general class of BPS intersections of
branes. We work in the approximation in which one of the branes is considered as a probe …

We review in a pedagogical manner some of the efforts aimed at extending the
gauge/gravity correspondence to nonconformal supersymmetric gauge theories in four …

In the string holographic dual of large-N c QCD with N f flavours of [1], the η'meson is
massless at infinite N c and dual to a collective fluctuation of N f D6-brane probes in a …

We present an orientifold of a toric singularity allowing for a configuration of fractional
branes which corresponds to a gauge theory that dynamically breaks supersymmetry in a …

We consider supergravity solutions of D5-branes wrapped on supersymmetric 2-cycles and
use them to discuss relevant features of four-dimensional N= 1 and N= 2 super-Yang–Mills …