Vacuum self-focusing of very intense laser beams
نویسندگان
چکیده
We argue that long-range photon-photon attraction induced by the dipole interaction of two electron-positron loops can lead to "vacuum self-focusing" of very intense laser beams. The focusing angle Î ̧F is found to increase with the beam intensity I as Î ̧F âˆ1⁄4 I4/3; for the laser beams available at present or in the near future, Î ̧F 10-10 10-7.
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