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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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14 papers · 2 filters
Gauge Fields and Fermions in Tachyon Effective Field Theories
Joseph A. Minahan, Barton Zwiebach
In this paper we incorporate gauge fields into the tachyon field theory models for unstable D-branes in bosonic and in Type II string theories. The chosen couplings yield massless…
Wound String Scattering in NCOS Theory
Fredric Kristiansson, Peter Rajan
We calculate the amplitude for a non-excited closed string with nonzero winding number to scatter from a D-string with a near critical E field. We go to the NCOS limit and observe…
Effective Tachyon Dynamics in Superstring Theory
Joseph A. Minahan, Barton Zwiebach
A recently proposed \ell=\infty field theory model of tachyon dynamics for unstable bosonic D-branes has been shown to arise as the two-derivative truncation of (boundary)-string f…
IIA/B, Wound and Wrapped
Ulf H. Danielsson, Alberto Guijosa, Martin Kruczenski
We examine the T-duality relation between 1+1 NCOS and the DLCQ limit of type IIA string theory. We show that, as long as there is a compact dimension, one can meaningfully define…
Flux tube solutions in noncommutative gauge theories
Alexios P. Polychronakos
We derive nonperturbative classical solutions of noncommutative U(1) gauge theory, with or without a Higgs field, representing static magnetic flux tubes with arbitrary cross-secti…
On B-independence of RR charges
A. Alekseev, A. Mironov, A. Morozov
Generalization of the recent Taylor-Polchinski argument is presented, which helps to explain quantization of RR charges in IIA-like theories in the presence of cohomologically triv…
D3-brane Holography
Ulf H. Danielsson, Alberto Guijosa, Martin Kruczenski +1
It has recently been conjectured that the AdS_5/SYM_4 correspondence can be generalized away from the conformal limit, to a duality between supergravity on the full asymptotically…
On area and entropy of a black hole
A. Alekseev, A. P. Polychronakos, M. Smedbäck
We consider a model of a black hole consisting of a number of elementary components. Examples of such models occur in the Ashtekar's approach to canonical Quantum Gravity and in M-…
Supersymmetric Fluid Mechanics
R. Jackiw, A. P. Polychronakos
When anticommuting Grassmann variables are introduced into a fluid dynamical model with irrotational velocity and no vorticity, the velocity acquires a nonvanishing curl and the re…
Restrictions on Gauge Groups in Noncommutative Gauge Theory
Keizo Matsubara
We show that the gauge groups SU(N), SO(N) and Sp(N) cannot be realized on a flat noncommutative manifold, while it is possible for U(N).
Brane Dynamics in Background Fluxes and Non-commutative Geometry
A. Yu. Alekseev, A. Recknagel, V. Schomerus
Branes in non-trivial backgrounds are expected to exhibit interesting dynamical properties. We use the boundary conformal field theory approach to study branes in a curved backgrou…
Wilson lines on noncommutative tori
Anton Alekseev, Andrei Bytsko
We introduce the notion of a monodromy for gauge fields with vanishing curvature on the noncommutative torus. Similar to the ordinary gauge theory, traces of the monodromies define…
Black Hole Formation in AdS and Thermalization on the Boundary
Ulf H. Danielsson, Esko Keski-Vakkuri, Martin Kruczenski
We investigate black hole formation by a spherically collapsing thin shell of matter in AdS space. This process has been suggested to have a holographic interpretation as thermaliz…
Closed constraint algebras and path integrals for loop group actions
A. Y. Alekseev, V. Schomerus, T. Strobl
In this note we study systems with a closed algebra of second class constraints. We describe a construction of the reduced theory that resembles the conventional treatment of first…