Journal
PHYSICS LETTERS B
Volume 812, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2020.136003
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Funding
- CNPq
- CAPES
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In this study, we investigate the dispersion of a classical electromagnetic field in a relativistic ideal gas of charged bosons using scalar quantum electrodynamics at finite temperature and charge density. The research reveals that the gas behaves as a left-handed material with negative effective index of refraction below the transverse plasmon frequency. In the condensed phase, the longitudinal plasmon dispersion relation shows a roton-type local minimum that disappears at the transition temperature.
We investigate the dispersion of a classical electromagnetic field in a relativistic ideal gas of charged bosons using scalar quantum electrodynamics at finite temperature and charge density. We derive the effective electromagnetic responses and the electromagnetic propagation modes that characterize the gas as a left-handed material with negative effective index of refraction n(eff) = -1 below the transverse plasmon frequency. In the condensed phase, we show that the longitudinal plasmon dispersion relation exhibits a roton-type local minimum that disappears at the transition temperature. (C) 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license.
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