论文标题
相对论玻色气中的负折射和roton
Negative refraction and rotons in the relativistic Bose gas
论文作者
论文摘要
我们使用标量量子电动力学在有限的温度和电荷密度下研究了经典电磁场在相对论的理想气体中的分散。我们得出了有效的电磁响应和电磁传播模式，该模式将气体作为左手材料的表征，其折射率为负有效指数$ n _ {\ rm eff} = - 横向等离子体频率以下。在凝结阶段，我们表明纵向等离子体分散关系显示出在过渡温度下消失的旋转型局部最小值。
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 $n_{\rm eff}=-1$ 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.
