中性粒子平行于介质运动时的切伦科夫摩擦
Cherenkov friction on a neutral particle moving parallel to a dielectric
摘要：
基于完全相对论框架和局域平衡假设，我们描述了一个简单的量子摩擦机制的粒子平行于介质运动。切伦科夫效应解释了裸基态如何变得全局不稳定，以及电磁场和粒子偶极子的波动如何转换为成对的激发。模拟粒子作为一个银纳米球，我们调查的力量和它的速度依赖性的频谱。我们发现银粒子中等离子体共振的阻尼在切伦科夫阈值速度附近有较强的影响。我们还提出了一个扩展的摩擦力的阈值速度附近的阻尼和无阻尼粒子。
英文摘要：
Based on a fully relativistic framework and the assumption of local equilibrium, we describe a simple mechanism of quantum friction for a particle moving parallel to a dielectric. The Cherenkov effect explains how the bare ground state becomes globally unstable and how fluctuations of the electromagnetic field and the particle's dipole are converted into pairs of excitations. Modelling the particle as a silver nano-sphere, we investigate the spectrum of the force and its velocity dependence. We find that the damping of the plasmon resonance in the silver particle has a relatively strong impact near the Cherenkov threshold velocity. We also present an expansion of the friction force near the threshold velocity for both damped and undamped particles.
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