All solutions of the no-birefringence conditions for nonlinear electrodynamics are found. In addition to known Born-Infeld and Plebanski cases, we find a ``reverse Born-Infeld'' case, which has limit Plebanski, an ``extreme-Born-Infeld'' arises as Lagrangian constraint. Only weak-field limit, only extreme-Born Infeld avoid superluminal propagation in constant electromagnetic backgrounds, but al...

Abstract The electromagnetic theory is considered in the framework of generally covariant approach, that applied to analysis electromagnetism noninertial coordinate and frame systems. special-relativistic formulation Maxwell’s electrodynamics arises flat Minkowski spacetime when general transformations are restricted a class preserving line element. particular attention paid rotating reference ...

Understanding physical properties of quantum emitters strongly interacting with quantized electromagnetic modes is one the primary goals in emergent field waveguide electrodynamics (QED). When light-matter coupling strength comparable to or even exceeds energies elementary excitations, conventional approaches based on perturbative treatment interactions, two-level description matter and photon-...

We formulate axion-electrodynamics and magnetohydrodynamics (MHD) in the cosmological context assuming weak gravity. The two formulations are made for a general scalar field with $f(\ensuremath{\phi})$-coupling, an axion as massive ${\ensuremath{\phi}}^{2}$-coupling, helical electromagnetic field. $\ensuremath{\alpha}$-dynamo term appears naturally from coupling MHD formulation. In presence of ...