2026-04-13T03:39:56Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2206512025-12-05T16:15:21Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Russo, J. G. (Jorge Guillermo) author Townsend, Paul K. author 2025-04-25T16:24:30Z 2025-04-25T16:24:30Z 2023 2025-04-25T16:24:30Z All solutions of the no-birefringence conditions for nonlinear electrodynamics are found. In addition to the known Born-Infeld and Plebanski cases, we find a “reverse Born-Infeld” case, which has a limit to Plebanski, and an “extreme-Born-Infeld” case, which arises as a Lagrangian constraint. Only Born-Infeld has a weak-field limit, and only BornInfeld and extreme-Born-Infeld avoid superluminal propagation in constant electromagnetic backgrounds, but all cases have a conformal strong-field limit that coincides with the strongfield limit of Born-Infeld found by Bialynicki-Birula. Camps de galga (Física) Electrodinàmica Teoria de camps (Física) Gauge fields (Physics) Electrodynamics Field theory (Physics) Nonlinear electrodynamics without birefringence