69 citations · 329 across the 11 of their papers we have counts for
11 papers
Over-Rotating Supertube Backgrounds
Daniel Brace
We study classical supertube probes on supergravity backgrounds which are sourced by over-rotating supertubes, and which therefore contain closed timelike curves. We show that the…
Closed Geodesics on Godel-type Backgrounds
Daniel Brace
We consider radial oscillations of supertube probes in the Godel-type background which is U-dual to the compactified pp-wave obtained from the Penrose limit of the NS five-brane ne…
Classical and Quantum Strings in compactified pp-waves and Godel type Universes
Daniel Brace, Carlos A. R. Herdeiro, Shinji Hirano
We consider Neveu-Schwarz pp-waves with spacetime supersymmetry. Upon compactification of a spacelike direction, these backgrounds develop Closed Null Curves (CNCs) and Closed Time…
Nonabelian Gauge Theories on Noncommutative Spaces
D. Brace, B. L. Cerchiai, B. Zumino
In this paper, we describe a method for obtaining the nonabelian Seiberg-Witten map for any gauge group and to any order in theta. The equations defining the Seiberg-Witten map are…
A Cohomological Approach to the Non-Abelian Seiberg-Witten Map
D. Brace, B. L. Cerchiai, A. F. Pasqua +2
We present a cohomological method for obtaining the non-Abelian Seiberg-Witten map for any gauge group and to any order in theta. By introducing a ghost field, we are able to expre…
Proof of a Symmetrized Trace Conjecture for the Abelian Born-Infeld Lagrangian
Paolo Aschieri, Daniel Brace, Bogdan Morariu +1
In this paper we prove a conjecture regarding the form of the Born-Infeld Lagrangian with a U(1)^2n gauge group after the elimination of the auxiliary fields. We show that the Lagr…