Non-linear Vacuum Phenomena in Non-commutative QED

Details Non-linear Vacuum Phenomena in Non-commutative QED Non-linear Vacuum Phenomena in Non-commutative QED

2000-06-27

arxiv.org/abs/hep-th/0006209v1

Int.J.Mod.Phys. A16 (2001) 1123-1146

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 23 pp

Scientific paper

We show that the classic results of Schwinger on the exact propagation of particles in the background of constant field-strengths and plane waves can be readily extended to the case of non-commutative QED. It is shown that non-perturbative effects on constant backgrounds are the same as their commutative counterparts, provided the on-shell gauge invariant dynamics is referred to a non-perturbatively related space-time frame. For the case of the plane wave background, we find evidence of the effective extended nature of non-commutative particles, producing retarded and advanced effects in scattering. Besides the known `dipolar' character of non-commutative neutral particles, we find that charged particles are also effectively extended, but they behave instead as `half-dipoles'.

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