paper

Large N Limit of Non-Commutative Gauge Theories

arXiv:hep-th/9908134 · doi:10.1088/1126-6708/1999/09/025

Abstract

Using the correspondence between gauge theories and string theory in curved backgrounds, we investigate aspects of the large limit of non-commutative gauge theories by considering gravity solutions with fields. We argue that the total number of physical degrees of freedom at any given scale coincides with the commutative case. We then compute a two-point correlation function involving momentum components in the directions of the -field. In the UV regime, we find that the two-point function decays exponentially with the momentum. A calculation of Wilson lines suggests that strings cannot be localized near the boundary. We also find string configurations that are localized in a finite region of the radial direction. These are worldsheet instantons.

21 pages, harvmac. Some errors in correlators corrected, minor corrections to the Lorentzian solutions

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