Results 1 - 10 of 1,366

Macroscopic strings as heavy quarks in large N gauge theory and Anti-de Sitter supergravity

by Soo-jong Rey, Jung-tay Yee - PHYS. J. C22
"... Maldacena has put forward large N correspondence between superconformal field theories on the brane and anti-de Sitter supergravity in spacetime. We study some aspects of the correspondence between N = 4 superconformal gauge theory on D3-brane and maximal supergravity on adS5 × S5 by introducing mac ..."
Abstract - Cited by 508 (1 self) - Add to MetaCart
potential and again find agreements between the gauge theory and the supergravity results. By turning on Ramond-Ramond zero-form potential, we also study θ vacuum angle dependence of the static potential. We finally discuss dynamical realization of loop equation via turning on local electric field

N=2 Sigma Models for Ramond-Ramond Backgrounds

by Nathan Berkovits , 2002
"... manifestly N=(2,2) worldsheet supersymmetric sigma models are constructed for the Type IIB superstring in Ramond-Ramond backgrounds. The Kahler potential in these N=2 sigma models depends on four chiral and antichiral bosonic superfields and two chiral and antichiral fermionic superfields. When the ..."
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manifestly N=(2,2) worldsheet supersymmetric sigma models are constructed for the Type IIB superstring in Ramond-Ramond backgrounds. The Kahler potential in these N=2 sigma models depends on four chiral and antichiral bosonic superfields and two chiral and antichiral fermionic superfields. When

hep-th/0104139 Ramond-Ramond Couplings of

by Noncommutative D-branes, Hong Liu, Jeremy Michelson , 2001
"... Abstract: We propose the leading couplings, in an α ′ expansion, of D-branes to Ramond-Ramond (RR) potentials in a constant NSNS B-field for an arbitrary choice of noncommutative parameter. The proposal is motivated by some string amplitude computations. The zero momentum couplings are topological i ..."
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Abstract: We propose the leading couplings, in an α ′ expansion, of D-branes to Ramond-Ramond (RR) potentials in a constant NSNS B-field for an arbitrary choice of noncommutative parameter. The proposal is motivated by some string amplitude computations. The zero momentum couplings are topological

Ramond-Ramond couplings of non-BPS D-branes ∗

by Marco Billó A, Ben Craps A, Frederik Roose A , 1999
"... We study how non-BPS type II D-branes couple to R-R potentials. Upon tachyon condensation the couplings we find give rise to the Wess-Zumino action of BPS D-branes. In a seminal series of papers, Sen has shown how to obtain an exact conformal field theory description of non-BPS D-branes (see [1] for ..."
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-dimensional branes. For type IIB this was demonstrated by Witten in [2], where all branes are built from sufficiently many D9–anti-D9 pairs. As to type IIA, Horava outlined the construction of lower branes from non-BPS D9-branes [3]. As is well-known, type II BPS D-branes couple to Ramond-Ramond gauge fields through

DAMTP-2006-111 hep-th/0611138 Tachyon Condensation and Non-BPS D-branes in a Ramond-Ramond Plane Wave Background

by Partha Mukhopadhyay , 2008
"... We consider string theory in maximally supersymmetric type IIB plane wave background with constant five form Ramond-Ramond flux (RR plane wave). It is argued that there exists a universal sector of string configurations independent of the null coordinate x − such that the space-time action evaluated ..."
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We consider string theory in maximally supersymmetric type IIB plane wave background with constant five form Ramond-Ramond flux (RR plane wave). It is argued that there exists a universal sector of string configurations independent of the null coordinate x − such that the space-time action

hep-th/0209164 D–Brane Dynamics in Constant Ramond–Ramond Potentials,

by Noncommutative Geometry, Lorenzo Cornalba, Miguel S. Costa , 2004
"... Abstract: We study the physics of D–branes in the presence of constant Ramond–Ramond potentials. In the string field theory context, we first develop a general formalism to analyze open strings in gauge trivial closed string backgrounds, and then apply it both to the RNS string and within Berkovits ..."
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Abstract: We study the physics of D–branes in the presence of constant Ramond–Ramond potentials. In the string field theory context, we first develop a general formalism to analyze open strings in gauge trivial closed string backgrounds, and then apply it both to the RNS string and within Berkovits

Comments on T-dualities of Ramond-Ramond potentials on tori,” Prog

by Masafumi Fukuma, Takeshi Oota, Hirokazu Tanaka - B
"... Inspired by a work of Brace, Morariu and Zumino, we give a simple proof that the type IIA/IIB effective actions compactified on T d are generically invariant under the T-duality group SO(d, d;Z) when R-R potentials are combined suitably with NS-NS 2-form and transform as a Majorana-Weyl spinor of SO ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
Inspired by a work of Brace, Morariu and Zumino, we give a simple proof that the type IIA/IIB effective actions compactified on T d are generically invariant under the T-duality group SO(d, d;Z) when R-R potentials are combined suitably with NS-NS 2-form and transform as a Majorana-Weyl spinor

RAMOND-RAMOND FIELDS, FRACTIONAL BRANES AND ORBIFOLD DIFFERENTIAL K-THEORY

by Richard J. Szabo, Alessandro Valentino , 2007
"... We study D-branes and Ramond-Ramond fields on global orbifolds of Type II string theory with vanishing H-flux using methods of equivariant K-theory and K-homology. We illustrate how Bredon equivariant cohomology naturally realizes stringy orbifold cohomology. We emphasize its role as the correct co ..."
Abstract - Cited by 7 (1 self) - Add to MetaCart
couplings of D-branes which generalize previous examples. We propose a definition for groups of differential characters associated to equivariant K-theory. We derive a Dirac quantization rule for Ramond-Ramond fluxes, and study flat Ramond-Ramond potentials on orbifolds.

D-brane dynamics in constant RamondRamond potentials and noncommutative geometry,” arXiv:hep-th/0209164. 31

by Lorenzo Cornalba, Miguel S. Costa , 1982
"... Abstract: We study the physics of D–branes in the presence of constant Ramond–Ramond potentials. We first develop a general formalism to analyze open strings in gauge trivial closed string backgrounds, and then apply it both to the RNS string and within Berkovits ’ covariant formalism, where the res ..."
Abstract - Cited by 13 (1 self) - Add to MetaCart
Abstract: We study the physics of D–branes in the presence of constant Ramond–Ramond potentials. We first develop a general formalism to analyze open strings in gauge trivial closed string backgrounds, and then apply it both to the RNS string and within Berkovits ’ covariant formalism, where

SO(d,d) transformations of Ramond-Ramond fields and space-time spinors. Nuclear Phys

by S. F. Hassan - B
"... We explicitly construct the SO(d, d) transformations of Ramond-Ramond field strengths and potentials, along with those of the space-time supersymmetry parameters, the gravitinos and the dilatinos in type-II theories. The results include the case when the SO(d, d) transformation involves the time dir ..."
Abstract - Cited by 31 (1 self) - Add to MetaCart
We explicitly construct the SO(d, d) transformations of Ramond-Ramond field strengths and potentials, along with those of the space-time supersymmetry parameters, the gravitinos and the dilatinos in type-II theories. The results include the case when the SO(d, d) transformation involves the time
Results 1 - 10 of 1,366