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arXiv 1701.06186quant-phcond-mat.mes-hall
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原子-表面量子摩擦中的空间色散

Spatial dispersion in atom-surface quantum friction

D. Reiche, D. A. R. Dalvit, K. Busch, F. Intravaia

摘要:

研究了空间色散对原子-表面量子摩擦的影响。我们表明,原子表面的分离短于载体的平均自由程内的材料,摩擦力可以是几个数量级大于预测的局部光学。此外,当考虑到空间色散效应,我们表明,常用的本地热平衡近似低估了约95%的阻力,通过采用最近报道的非平衡波动耗散关系的量子摩擦。与基于局部光学的处理不同,空间色散结合对局部热平衡的校正不仅改变了量子摩擦的大小,而且改变了量子摩擦的距离标度。

英文摘要:

We investigate the influence of spatial dispersion on atom-surface quantum friction. We show that for atom-surface separations shorter than the carrier's mean free path within the material, the frictional force can be several orders of magnitude larger than that predicted by local optics. In addition, when taking into account spatial dispersion effects, we show that the commonly used local thermal equilibrium approximation underestimates by approximately 95% the drag force, obtained by employing the recently reported nonequilibrium fluctuation-dissipation relation for quantum friction. Unlike the treatment based on local optics, spatial dispersion in conjunction with corrections to local thermal equilibrium not only change the magnitude but also the distance scaling of quantum friction.

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