Frictionless Flow in a Binary Polariton Superfluid
Frictionless Flow in a Binary Polariton Superfluid
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二元极化子超流体中的无摩擦流动
DOI：
10.1103/physrevlett.108.065301
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发表时间：
2012
影响因子：
8.6
通讯作者：
Cancellieri E
中科院分区：
文献类型：
--
作者：
Cancellieri E
研究了不同动量和能量的激光相干注入二元微腔极化激元超流体的性质。从超音速到亚音速制度，其中运动是无摩擦的交叉，通过评估系统的线性响应弱缺陷的潜力。我们表明，这两个组件之间的耦合要求，无论是两个组件流没有摩擦或都对缺陷散射，虽然散射可以很小，当两种流体弱耦合。通过分析施加在缺陷上的阻力，我们给出了一个实验解决从超音速到亚音速区的交叉的配方。
We study the properties of a binary microcavity polariton superfluid coherently injected by two lasers at different momenta and energies. The crossover from the supersonic to the subsonic regime, where motion is frictionless, is described by evaluating the linear response of the system to a weak defect potential. We show that the coupling between the two components requires that either both components flow without friction or both scatter against the defect, though scattering can be small when the two fluids are weakly coupled. By analyzing the drag force exerted on a defect, we give a recipe to experimentally address the crossover from the supersonic to the subsonic regime.