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19 papers · 2 filters
Branes in the Euclidean AdS_3
B. Ponsot, V. Schomerus, J. Teschner
In this work we propose an exact microscopic description of maximally symmetric branes in a Euclidean background. As shown by Bachas and Petropoulos, the most important suc…
D-Branes in Coset Models
Stefan Fredenhagen, Volker Schomerus
The analysis of D-branes in coset models G/H provides a natural extension of recent studies on branes in WZW-theory and it has various interesting applications to physically releva…
UV/IR Mixing via Closed Strings and Tachyonic Instabilities
Adi Armoni, Esperanza Lopez
We discuss UV/IR mixing effects in non-supersymmetric non-commutative U(N) gauge theories. We show that the singular (non-planar) terms in the 2- and 3-point functions, namely the…
Dirichlet Branes on Orientifolds
N. Quiroz, B. Stefanski
We consider the classification of BPS and non-BPS D-branes in orientifold models. In particular we construct all stable BPS and non-BPS D-branes in the Gimon-Polchinski (GP) and Da…
On D0-branes in Gepner models
Emanuel Scheidegger
We show why and when D0-branes at the Gepner point of Calabi-Yau manifolds given as Fermat hypersurfaces exist.
Two Loops to Two Loops in N=4 Supersymmetric Yang-Mills Theory
Jan Plefka, Matthias Staudacher
We present a full two-loop O(g^6) perturbative field theoretic calculation of the expectation value of two circular Maldacena-Wilson loops in D=4 N=4 supersymmetric U(N) gauge theo…