Bose–Einstein condensation: Where many become one and, therefore, there is plenty of room at the bottom

Pramana

N Kumar1¹ 

[1] Raman Research Institute, Bangalore 560 080, India$$

关键词: Bose–Einstein condensation;    Bose–Einstein statistics;    indistinguishability;    Bosonic stimulation;    condensate;    quantized vortex;    de Boer quantum parameter;    non-classical rotational inertia;    supersolid.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Bose–Einstein condensation and superfluidity are well known to occur in the dilute gaseous as well as in the dense liquid state of matter having a fixed number of Bose particles. Very recently, experimental evidence has been obtained for the probable realization of BEC and superfluidity in 4He in the solid state too, as revealed through its non-classical rotational moment of inertia – smaller than that for the solid. Such a solid that can also subtend a flow as superfluid – and hence a supersolid – is indeed a surprise of condensed matter physics. In this conversation, an order-parameter description for the supersolid state will be given in which the superfluid flow is decoupled from the crystalline density modulation which remains at rest in the laboratory frame, thus giving it a non-classical inertia.

【 授权许可】

Unknown