منابع مشابه
Instantons on D-branes
We consider type IIA compactification on K3. We show that the instanton subsectors of the worldvolume of N 4-branes wrapped around K3 lead to a Hagedorn density of BPS states in accord with heterotic-type IIA duality in 6 dimensions. We also find evidence that the correct framework to understand the results of Nakajima on the appearance of affine Kac-Moody algebras on the cohomology of moduli s...
متن کامل3-Branes on Eguchi-Hanson 6D Instantons
We use the approach used by Eguchi-Hanson in constructing four-dimensional instanton metrics and construct a class of regular six-dimensional instantons which are nothing but S × S resolved conifolds. We then also obtain D3-brane solutions on these EHresolved conifolds.
متن کاملNonlinear Instantons from Supersymmetric p-Branes
Supersymmetric configurations of type II D-branes with nonzero gauge field strengths in general supersymmetric backgrounds with nonzero B fields are analyzed using the κsymmetric worldvolume action. It is found in dimension four or greater that the usual instanton equation for the gauge field obtains a nonlinear deformation. The deformation is parameterized by the topological data of the B-fiel...
متن کاملBranes and instantons intersecting at angles
We study in detail the system of D6 branes and euclidean D2-brane instantons intersecting at angles in type IIA string theory. We find that in the absence of orientifolds the system does not contribute to the low energy superpotential, in agreement with expectations based on effective field theory arguments. We also comment on the implications of our results for dual string theory pictures.
متن کاملNS5-Branes, T-Duality and Worldsheet Instantons
The equivalence of NS5-branes and ALF spaces under T-duality is well known. However, a naive application of T-duality transforms the ALF space into a smeared NS5-brane, de-localized on the dual, transverse, circle. In this paper we re-examine this duality, starting from a two-dimensional N = (4, 4) gauged linear sigma model describing Taub-NUT space. After dualizing the S fiber, we find that th...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2011
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x11053651