2012/01/14 by Alexander B. Balakin, V. V. Bochkarev, Vladimir V. Bochkarev +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1140/epjc/s10052-012-1895-3
published as Eur. Phys. J. C. (2012) 72: 1895 · 26 pages, 5 figures, accepted for publication in The European Physical Journal C
arxiv created 2012/01/14 · openalex publication_date 2012/02/01 · arxiv updated 2012/02/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We establish an extended version of the Einstein - Maxwell - axion model by introducing into the Lagrangian cross-terms, which contain the gradient four-vector of the pseudoscalar (axion) field in convolution with the Maxwell tensor. The gradient model of the axion-photon coupling is applied to cosmology: we analyze the Bianchi-I type Universe with an initial magnetic field, electric field induced by the axion-photon interaction, cosmological constant and dark matter, which is described in terms of the pseudoscalar (axion) field. Analytical, qualitative and numerical results are presented in detail for two distinguished epochs: first, for the early Universe with magnetic field domination; second, for the stage of late-time accelerated expansion.