108 citations · 378 across the 14 of their papers we have counts for
9 papers · 1 filter
Strings in plane-fronted gravitational waves
C. Duval, Z. Horvath, P. A. Horvathy
Brinkmann's plane-fronted gravitational waves with parallel rays --~shortly pp-waves~-- are shown to provide, under suitable conditions, exact string vacua at all orders of the sig…
Vanishing of the conformal anomaly for strings in a gravitational wave
C. Duval, Z. Horvath, P. A. Horvathy
Using the non-symmetric-connection approach proposed by Osborn, we demonstrate that, for a bosonic string in a specially chosen plane-fronted gravitational wave and an axion backgr…
Noncommutative Instantons via Dressing and Splitting Approaches
Zalan Horvath, Olaf Lechtenfeld, Martin Wolf
Almost all known instanton solutions in noncommutative Yang-Mills theory have been obtained in the modified ADHM scheme. In this paper we employ two alternative methods for the con…
A Two-loop Test of Buscher's T-duality I
Zalan Horvath, Robert L. Karp, Laszlo Palla
We study the two loop quantum equivalence of sigma models related by Buscher's T-duality transformation. The computation of the two loop perturbative free energy density is perform…
On quantum equivalence of dual sigma models: examples
Z. Horváth, R. L. Karp, L. Palla
The equivalence of several sigma models and their special Abelian duals is investigated in the two loop order of perturbation theory. The investigation is based on extracti…
Perturbative Quantum (In)equivalence of Dual Models in dimensions
J. Balog, P. Forgács, Z. Horváth +1
Various examples of target space duality transformations are investigated up to two loop order in perturbation theory. Our results show that when using the tree level (`naive') tra…