673 citations · 10.9k across the 206 of their papers we have counts for
8 papers · 1 filter
Closed String Brane-Like States, Brane Bound States and Noncommutative Branes
D. Polyakov, M. M. Sheikh-Jabbari
We study the mass and different RR charge distributions of the BPS (p,p-2)-brane bound states in the closed string brane-like -model. We show that such brane bound states can be…
A Note on T-Duality, Open Strings in B-field Background and Canonical Transformations
M. M. Sheikh-Jabbari
In this paper we study T-duality for open strings ending on branes with non-zero B-field on them from the point of view of canonical transformations. For the particular case of typ…
On the Deformation of -Symmetry in B-field Background
M. M. Sheikh-Jabbari
In this note we will show that the symmetry, namely the U(1) symmetry of the open string sigma model which relates the B-field and the U(1) gauge field of a brane to each other…
Supergravity and Large N Noncommutative Field Theories
Mohsen Alishahiha, Yaron Oz, M. M. Sheikh-Jabbari
We consider systems of Dp branes in the presence of a nonzero B field. We study the corresponding supergravity solutions in the limit where the branes worldvolume theories decouple…
Boundary Conditions as Dirac Constraints
M. M. Sheikh-Jabbari, A. Shirzad
In this article we show that boundary conditions can be treated as Lagrangian and Hamiltonian constraints. Using the Dirac method, we find that boundary conditions are equivalent t…
Dirac Quantization of Open Strings and Noncommutativity in Branes
F. Ardalan, H. Arfaei, M. M. Sheikh-Jabbari
We apply the Dirac bracket quantization to open strings attached to branes in the presence of background antisymmetric field and recover an inherent noncommutativity in the interna…