Universal electromagnetic fields. (1st August 2018)

• Record Type: Journal Article
• Authors: Hervik, Sigbjørn; Ortaggio, Marcello; Pravda, Vojtěch
• Is Part Of: Classical and quantum gravity. Volume 35:Number 17(2018:Sep.)
• Publication Date: 2018-08-01
• Subjects: nonlinear electrodynamics -- Maxwell equations -- classical field theories on curved backgrounds; Quantum gravity -- Periodicals; Gravitation -- Periodicals; Relativity (Physics) -- Periodicals; Space and time -- Periodicals; Periodicals; 521.1
• DOI: 10.1088/1361-6382/aad13d
• Languages: English
• ISSNs: 0264-9381

Abstract

Abstract: We study universal electromagnetic (test) fields, i.e. p -forms fields that solve simultaneously (virtually) any generalized electrodynamics (containing arbitrary powers and derivatives of in the field equations) in n spacetime dimensions. One of the main results is a sufficient condition: any null that solves Maxwell's equations in a Kundt spacetime of aligned Weyl and traceless-Ricci type III is universal (in particular thus providing examples of p -form Galileons on curved Kundt backgrounds). In addition, a few examples in Kundt spacetimes of Weyl type II are presented. Some necessary conditions are also obtained, which are particularly strong in the case n = 4 = 2 p : all the scalar invariants of a universal 2-form in four dimensions must be constant, and vanish in the special case of a null .