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Title: Photon propagator for axion electrodynamics

The axion modified electrodynamics is usually used as a model for description of possible violation of Lorentz invariance in field theory. The low-energy manifestation of Lorentz violation can hopefully be observed in experiments with electromagnetic waves. It justifies the importance of studying how a small axion addition can modify the wave propagation. Although a constant axion does not contribute to the dispersion relation at all, even a slowly varying axion field destroys the light cone structure. In this paper, we study the wave propagation in the axion modified electrodynamics in the framework of the premetric approach. In addition to the modified dispersion relation, we derive the axion generalization of the photon propagator in Feynman and Landau gauge. Our consideration is free of the usual restriction to the constant gradient axion field. It is remarkable that the axion modified propagator is Hermitian. Consequently, the dissipation effects are absent even in the phenomenological model considered here.
Authors:
 [1]
  1. Institute of Mathematics, Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904 (Israel) and Jerusalem College of Technology, P.O.B. 16031, Jerusalem, 91160 (Israel)
Publication Date:
OSTI Identifier:
21032522
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 76; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevD.76.087505; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AXIONS; DISPERSION RELATIONS; ELECTROMAGNETIC RADIATION; LIGHT CONE; LORENTZ INVARIANCE; PHOTONS; PROPAGATOR; QUANTUM ELECTRODYNAMICS; WAVE PROPAGATION