Journal
PHYSICS LETTERS A
Volume 341, Issue 5-6, Pages 357-365Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2005.05.006
Keywords
axion piece; material media; magnetoelectric effect; measurement of axion piece; axion electrodynamics
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In order to settle the problem of the Post constraint in material media, we consider the propagation of a plane electromagnetic wave in a medium with a piecewise constant axion field. Although a constant axion field does not affect the wave propagation in a homogeneous medium, we show that the reflection and transmission of a wave at an interface between the two media is sensitive to the difference of the axion values. This observation can be used to determine experimentally the axion piece in matter despite the fact that a constant axion value does not contribute to the Maxwell equations. (c) 2005 Elsevier B.V. All rights reserved.
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