1998/04/16 by Holger Gies, Walter Dittrich · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #hep-ph #hep-th
paper · pdf · doi:10.1016/s0370-2693(98)00572-3
published as Phys.Lett. B431 (1998) 420-429 · 6 pages, REVTeX
arxiv created 1998/04/16 · openalex publication_date 1998/07/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Within the geometric optics approximation, we derive the light cone condition for a class of homogeneous non-trivial QED vacua using the effective action approach. Our result generalizes the ``unified formula'' suggested by Latorre, Pascual and Tarrach which turns out to be a low-energy limit. We calculate the velocity shifts induced by electromagnetic fields and finite temperature and especially analyze the high-energy limit consistent with the loop approximation.