Semiclassical strings, dipole deformations of Script N = 1 SYM and decoupling of KK modes

Abstract

In this paper we investigate the recently found γ-deformed Maldacena-Nunez background by studying the behavior of different semiclassical string configurations. This background is conjectured to be dual to dipole deformations of N = 1 SYM. We compare our results to those in the pure Maldacena-Nunez background and show that the energies of our string configurations are higher than in the undeformed background. Thinking in the lines of (hep-th/0505100) we argue that this is an evidence for better decoupling of the Kaluza-Klein modes from the pure SYM theory excitations. Moreover we are able to find a limit of the background in which the string energy is independent of γ, these strings are interpreted as corresponding to pure gauge theory effects. 1

Strings on the deformedT1,1: giant magnon and single spike solutions

“…The results show that the dispersion relations are of the same transcendental type as the ones in the undeformed case [54]. The explicit dependence on γ shows up as a shift of the (generalized) angular amplitude -a behavior familiar from the studies of most supersymmetric case of strings in deformed AdS 5 × S 5 background [33][34][35][36].…”

Spiky strings, giant magnons, andβdeformations

“…5 Semiclassical strings solutions in the Lunin-Maldacena background were considered in [35], [36], [37], [38], [39] see also [40], for a nice review on the subject and a complete list of references see [42] Using the expressions for the energy and the angular momentum (2.14) and equations (5.39) we find…”

KK-masses in dipole deformed field theories

“…They noted then that the volume of the compact internal manifolds in the deformed background are smaller than in the undeformed one, therefore indicating a possible disentanglement of the KK-states from the interesting gauge theory dynamics. Further aspects of KK-states in these supergravity backgrounds have been discussed in [13,14].…”