553 research outputs found
Fractional Branes on a Non-compact Orbifold
Fractional branes on the non-compact orbifold \C^3/\Z_5 are studied. First,
the boundary state description of the fractional branes are obtained. The
open-string Witten index calculated using these states reproduces the adjacency
matrix of the quiver of . Then, using the toric crepant resolution of the
orbifold \C^3/\Z_5 and invoking the local mirror principle, B-type branes
wrapped on the holomorphic cycles of the resolution are studied. The boundary
states corresponding to the five fractional branes are identified as bound
states of BPS D-branes wrapping the 0-, 2- and 4-cycles in the exceptional
divisor of the resolution of \C^3/\Z_5.Comment: Latex2e, 25 pages, typos corrected, minor modifications, version to
appear in JHE
U-duality and Network Configurations of Branes
We explicitly write down the invariant supersymmetry conditions for branes
with generic values of moduli and U-duality charges in various space-time
dimensions . We then use these results to obtain new BPS states,
corresponding to network type structure of such branes.Comment: 26 pages, Latex, Title and Text modified (minor modifications), to
appear in Int. Jour. Mod. Phys.
AdS black holes with higher derivative corrections in presence of string cloud
We consider asymptotically AdS black hole solutions in presence of string
clouds and higher derivative corrections. We find that it admits three black
hole solutions within a region of the parameter space. In order to examine the
stabilities of these solutions we consider a thermodynamic analysis. Using
holography, we have studied the quark-antiquark distance and binding energy in
the dual gauge theory.Comment: 25 pages, 27 figures, LaTe
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