Effects of disorder in a dilute Bose gas.
Effects of disorder in a dilute Bose gas.
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DOI：
10.1103/physrevb.49.12938
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发表时间：
1994-02
期刊：
影响因子：
--
通讯作者：
Giorgini;Pitaevskii;Stringari
中科院分区：
文献类型：
--
作者：
Giorgini;Pitaevskii;Stringari
讨论了零温下弱随机外势对稀玻色气体性质的影响。恢复了黄和孟最近获得的关于凝析油贫化和超流密度的结果。的声速以及其阻尼由于碰撞与外场的移位的结果。计算了稠密超流体的声子阻尼。
We discuss the effects of a weak random external potential on the properties of the dilute Bose gas at zero temperature. The results recently obtained by Huang and Meng for the depletion of the condensate and of the superfluid density are recovered. Results for the shift of the velocity of sound as well as for its damping due to collisions with the external field are presented. The damping of phonons is calculated also for dense superfluids.