期刊
PHYSICS LETTERS A
卷 378, 期 46, 页码 3413-3418出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2014.09.049
关键词
Classical electrodynamics; Dilaton field; General Relativity; Equivalence principle; Axion field; Skewon field
资金
- National Science Council [NSC102-2112-M-007-019]
- National Center for Theoretical Sciences (NCTS)
We study the electromagnetic wave propagation in the joint dilaton field and axion field. Dilaton field induces amplification/attenuation in the propagation while axion field induces polarization rotation. The amplification/attenuation induced by dilaton is independent of the frequency (energy) and the polarization of electromagnetic waves (photons). From observations, the agreement with and the precise calibration of the cosmic microwave background (CMB) to blackbody radiation constrains the fractional change of dilaton vertical bar Delta psi vertical bar/psi to less than about 8 x 10(-4) since the time of the last scattering surface of the CMB. (C) 2014 Elsevier B.V. All rights reserved.
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