Vacuum self-focussing of very intense laser beams
arXiv:hep-ph/0611133 · doi:10.1103/PhysRevA.75.043807
Abstract
We argue that long-range photon-photon attraction induced by the dipole interaction of two electron-positron loops can lead to "vacuum self-focussing" of very intense laser beams. The focussing angle theta(F) is found to increase with the beam intensity I as theta(F) I^(4/3); for the laser beams available at present or in the near future, theta(F) 10^(-10)--10^(-7).
8 pages, 2 figures; discussion expanded