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Classical gauge instantons from open strings
We study the D3/D(-1) brane system and show how to compute instanton corrections to correlation functions of gauge theories in four dimensions using open string techniques. In particular we show thatExpand
We show that the boundary state description of a Dp-brane is strictly related to the corresponding classical solution of the low-energy string effective action. By projecting the boundary state onExpand
Microscopic string analysis of the D0-D8 brane system and dual R-R states ∗
Abstract Using the boundary state formalism, we perform a microscopic string analysis of the interaction between two D-branes and provide a local interpretation for the R-R force in the D0–D8 braneExpand
(F,Dp) bound states from the boundary state
Abstract We use the boundary state formalism to provide the full conformal description of (F,D p ) bound states. These are BPS configurations that arise from a superposition of a fundamental stringExpand
Stable non-BPS D-branes in type I string theory
Abstract We use the boundary state formalism to study, from the closed string point of view, superpositions of branes and anti-branes which are relevant in some non-perturbative string dualities.Expand
The geometry of fractional branes
Abstract By looking at fractional Dp-branes of type IIA on T4/Z2 as wrapped branes and by using boundary state techniques we construct the effective low-energy action for the fields generated byExpand
Exotic instanton counting and heterotic/type I′ duality
We compute the partition function for the exotic instanton system corresponding to D-instantons on D7 branes in Type I' theory. We exploit the BRST structure of the moduli action and its deformationExpand
Fractional D-branes and their gauge duals
We study the classical geometry associated to fractional D3-branes of type IIB string theory on 42 which provide the gravitational dual for = 2 super Yang-Mills theory in four dimensions. As one canExpand
Non-perturbative gauge/gravity correspondence in $ \mathcal{N} $ = 2 theories
A bstractWe derive the exact supergravity profile for the twisted scalar field emitted by a system of fractional D3 branes at a $ {\mathbb{Z}_2} $ orbifold singularity supporting $ \mathcal{N} $ = 2Expand
Is a classical description of stable non-BPS D-branes possible?☆
Abstract We study the classical geometry produced by a stack of stable (i.e., tachyon-free) non-BPS D-branes present in K3 compactifications of type II string theory. This classical representation isExpand