Artigo
Causal structure and birefringence in nonlinear electrodynamics
Registro en:
Modern Physics Letters A, v. 30, n. 6, 14 p., 2015.
0217-7323
10.1142/S021773231550025X
WOS:000349849200003
Autor
Melo, C. A. M. de [UNESP]
Medeiros, L. G.
Pompeia, P. J.
Resumen
We investigate the causal structure of general nonlinear electrodynamics and determine which Lagrangians generate an effective metric conformal to Minkowski. We also prove that there is only one analytic nonlinear electrodynamics not presenting birefringence. Fundação de Apoio à Pesquisa do Estado do Rio Grande do Norte (FAPERN) Univ Fed Alfenas, Inst Ciencia &Tecnol, BR-37701970 Pocos De Caldas, MG, Brazil Univ Estadual Paulista, Inst Fis Teor, BR-01156970 Sao Paulo, Brazil Univ Fed Rio Grande do Norte, Escola Ciencia &Tecnol, BR-59078970 Natal, RN, Brazil Univ Fed Rio Grande do Norte, Dept Fis Teor &Expt, BR-59078970 Natal, RN, Brazil Inst Fomento &Coordenacao Ind, Dept Ciencia &Tecnol Aeroesp, BR-12228901 Sao Paulo, Brazil Inst Tecnol Aeronaut, Dept Ciencia &Tecnol Aeroesp, BR-12228900 Sao Jose Dos Campos, Brazil Univ Estadual Paulista, Inst Fis Teor, BR-01156970 Sao Paulo, Brazil