Josephson relation for disordered superfluids
Josephson relation for disordered superfluids
复制标题
无序超流体的约瑟夫森关系
DOI：
10.1103/physreva.91.023602
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发表时间：
2015
影响因子：
2.9
通讯作者：
C. Müller
中科院分区：
文献类型：
--
作者：
C. Müller
约瑟夫森求和规则通过单粒子格林函数的红外留数将超流密度与凝聚序参量联系起来。我们为无序凝聚体建立了一个在系综平均下有效的约瑟夫森关系。这个关系的优点在于明确展示了超流性如何与相干密度，即零动量粒子的密度相联系。对于弱无序情况，与微扰理论达成了详细的一致。
The Josephson sum rule relates the superfluid density to the condensate order parameter, via the infrared residue of the single-particle Green's function. We establish an effective Josephson relation for disordered condensates valid upon ensemble averaging. This relation has the merit to show explicitly how superfluidity links to the coherent density, i.e., the density of particles with zero momentum. Detailed agreement is reached with perturbation theory for weak disorder.