Collective polarization exchanges in collisions of photon clouds

Details Collective polarization exchanges in collisions of photon clouds Collective polarization exchanges in collisions of photon clouds

2004-04-27

arxiv.org/abs/hep-ph/0404247v2

Phys.Rev.Lett. 93 (2004) 133601

Physics

High Energy Physics

High Energy Physics - Phenomenology

Recapitulates much that is in hep-ph/0402127, with new results in the last section, and the first section drastically reduced

Scientific paper

10.1103/PhysRevLett.93.133601

The one-loop "vacuum" Heisenberg-Euler coupling of four electromagnetic fields can lead to interesting collective effects in the collision of two photon clouds, on a time scale orders of magnitude faster than one estimates from the cross-section and density. We estimate the characteristic time for macroscopic transformation of positive to negative helicity in clouds that are initially totally polarized and for depolarization of a polarized beam traversing an unpolarized cloud.

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