Path-integral Monte Carlo study of low-temperatureclusters
- 9 October 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (15) , 1601-1604
- https://doi.org/10.1103/physrevlett.63.1601
Abstract
Path-integral Monte Carlo calculations have been used to study clusters at low temperatures. We develop a fluctuation formula for the superfluid fraction in terms of a projected area swept out by a path. Manifestations of superfluid behavior are shown to exist in a cluster of 64 atoms and a remnant of the λ transition persists in a cluster of 128 atoms. The temperature dependence of the superfluid fraction is similar to that observed in the liquid.
Keywords
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