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arXiv · 1109.4083

Refractive Index of Light in the Quark-Gluon Plasma with the Hard-Thermal-Loop Perturbation Theory

Juan Liu·M. J. Luo·Qun Wang·Hao-jie Xu
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Abstract

The electric permittivity and magnetic permeability for the quark-gluon plasma (QGP) is calculated within the hard-thermal-loop (HTL) perturbation theory. The refractive indices in the magnetizable and non-magnetizable plasmas are calculated. In a magnetizable plasma, there is a frequency pole $\omega_{mp}$ in the magnetic permeability and the refractive index. The refractive index becomes negative in the range $\omega\in[k,\omega_{mp}]$, where $k$ is the wave number, but no propagating modes are found. In a non-magnetizable plasma, the magnetic permeability and the refractive index are always positive. This marks the main distinction of a weakly coupled plasma from a strongly coupled one, where the negative refraction is shown to exist in a holographic theory.

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Juan Liu, M. J. Luo, Qun Wang, Hao-jie Xu. 2011-09-19. Refractive Index of Light in the Quark-Gluon Plasma with the Hard-Thermal-Loop Perturbation Theory. https://doi.org/10.1103/physrevd.84.125027

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