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Classical gauge instantons from open strings

- M. Billo', M. Frau, F. Fucito, A. Lerda, A. Liccardo, I. Pesando
- Physics
- 26 November 2002

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 that… Expand

CLASSICAL p-BRANES FROM BOUNDARY STATE ∗

- P. Vecchia, M. Frau, I. Pesando, S. Sciuto, A. Lerda, R. Russo
- Physics
- 7 July 1997

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 on… Expand

Microscopic string analysis of the D0-D8 brane system and dual R-R states ∗

- M. Billo', P. Vecchia, +4 authors S. Sciuto
- Physics
- 12 February 1998

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 brane… Expand

(F,Dp) bound states from the boundary state

- P. Vecchia, M. Frau, A. Lerda, A. Liccardo
- Physics
- 28 June 1999

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 string… Expand

Stable non-BPS D-branes in type I string theory

- M. Frau, L. Gallot, A. Lerda, P. Strigazzi
- Physics
- 15 March 1999

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

- M. Frau, A. Liccardo, R. Musto
- Physics
- 5 December 2000

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 by… Expand

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 deformation… Expand

Fractional D-branes and their gauge duals

- M. Bertolini, P. Vecchia, M. Frau, A. Lerda, R. Marotta, I. Pesando
- Physics
- 9 November 2000

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 can… Expand

Non-perturbative gauge/gravity correspondence in $ \mathcal{N} $ = 2 theories

- M. Billo', M. Frau, +4 authors D. R. Pacifici
- Physics
- 18 June 2012

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} $ = 2… Expand

Is a classical description of stable non-BPS D-branes possible?☆

- M. Bertolini, P. Vecchia, M. Frau, A. Lerda, R. Marotta, R. Russo
- Physics
- 12 July 2000

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 is… Expand

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