Clustering and phase transitions in a 2D superfluid with immiscible active impurities
Clustering and phase transitions in a 2D superfluid with immiscible active impurities
复制标题
具有不混溶活性杂质的二维超流体中的聚类和相变
DOI:
10.1088/1751-8121/ab2607
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Giuriato U
中科院分区:
文献类型:
--
作者:
Giuriato U
Phase transitions of a finite-size two-dimensional superfluid of bosons in presence of active impurities are studied by using the projected Gross–Pitaevskii model. Impurities are described with classical degrees of freedom. A spontaneous clustering of impurities during the thermalization is observed. Depending on the interaction among impurities, such clusters can break due to thermal fluctuations at temperatures where the condensed fraction is still significant. The emergence of clusters is found to increase the condensation transition temperature. The condensation and the Berezinskii–Kosterlitz–Thouless transition temperatures, determined numerically, are found to strongly depend on the volume occupied by the impurities: a relative increase up to a of their respective values is observed, whereas their ratio remains approximately constant.
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