Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-12-20
Phys.Lett. B558 (2003) 191-196
Physics
High Energy Physics
High Energy Physics - Theory
8 pages. v2 and v3: minor corrections, added references
Scientific paper
10.1016/S0370-2693(03)00271-5
We show that after the Seiberg-Witten map is performed the action for noncommutative field theories can be regarded as a coupling to a field dependent gravitational background. This gravitational background depends only on the gauge field. Charged and uncharged fields couple to different backgrounds and we find that uncharged fields couple more strongly than the charged ones. We also show that the background is that of a gravitational plane wave. A massless particle in this background has a velocity which differs from the velocity of light and we find that the deviation is larger in the uncharged case. This shows that noncommutative field theories can be seen as ordinary theories in a gravitational background produced by the gauge field with a charge dependent gravitational coupling.
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