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30 papers · 2 filters
Schwinger Mechanism for Fermion Pair Production in the Presence of Arbitrary Time Dependent Background Electric Field
Fred Cooper, Gouranga C. Nayak
We study the Schwinger mechanism for the pair production of fermions in the presence of an arbitrary time-dependent background electric field E(t) by directly evaluating the path i…
String interactions on the random lattice
Haidong Feng, Yu-tin Huang, Warren Siegel
We combine two partons on a random lattice as a vector state. In the ladder approximation, we find that such states have 1/p^2 propagators (after tuning the mass to vanish). We als…
Schwinger Mechanism in the Presence of Arbitrary Time Dependent Background Electric Field
Fred Cooper, Gouranga C. Nayak
We study, for the first time, the Schwinger mechanism for the pair production of charged scalars in the presence of an arbitrary time-dependent background electric field E(t) by by…
On the D3-brane description of some 1/4 BPS Wilson loops
Nadav Drukker, Simone Giombi, Riccardo Ricci +1
Recently it has been proposed that Wilson loops in high-dimensional representations in N=4 supersymmetric Yang-Mills theory (or multiply wrapped loops) are described by D-branes in…
Marginal Deformations of N=4 SYM and Open vs. Closed String Parameters
Manuela Kulaxizi
We make precise the connection between the generic Leigh--Strassler deformation of N=4 SYM and noncommutativity. We construct an appropriate noncommutativity matrix, which turns ou…
Nonperturbative corrections to 4D string theory effective actions from SL(2,Z) duality and supersymmetry
Daniel Robles-Llana, Martin Rocek, Frank Saueressig +2
We find the D(-1) and D1-brane instanton contributions to the hypermultiplet moduli space of type IIB string compactifications on Calabi-Yau threefolds. These combine with known pe…