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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
CLASSICAL p-BRANES FROM BOUNDARY STATE ∗
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
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