Mayers J
Rutherford Appleton Laboratory, Chilton OX11 0QX, United Kingdom.
Phys Rev Lett. 2004 Apr 2;92(13):135302. doi: 10.1103/PhysRevLett.92.135302. Epub 2004 Apr 1.
It is shown that the assumption that the many particle wave functions describing superfluid 4He have some phase coherence properties of correlated basis functions provides a new explanation of the link between Bose-Einstein condensation and two fluid behavior. This assumption also implies that the condensate fraction is proportional to the superfluid fraction, in agreement with experiment, and provides a simple quantitative explanation of the anomalous reduction in spatial order and liquid density, observed as the temperature is lowered in superfluid 4He.
结果表明，描述超流4He的多粒子波函数具有相关基函数的某些相位相干特性这一假设，为玻色-爱因斯坦凝聚与双流体行为之间的联系提供了一种新的解释。该假设还意味着凝聚分数与超流分数成正比，这与实验结果一致，并为超流4He中温度降低时观察到的空间有序度和液体密度的反常降低提供了一个简单的定量解释。
