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arXiv 1101.2600cond-mat.quant-gas
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二维软核玻色子的Phase diagram

Phase diagram of soft-core bosons in two dimensions

S. Saccani, S. Moroni, M. Boninsegni

摘要:

用数值模拟的方法研究了玻色软磁盘的二维低温相图。结果表明,超固态团簇相存在,在模型参数的范围内,类似于最近观察到的一个系统的排列偶极子相互作用,通过在短距离软化电位。这些发现表明,一个长程尾的相互作用是不需要获得这样的相,软核排斥相互作用是超固体的极小模型。

英文摘要:

The low temperature phase diagram of Bose soft disks in two dimensions is studied by numerical simulations. It is shown that a supersolid cluster phase exists, within a range of the model parameters, analogous to that recently observed for a system of aligned dipoles interacting via a softened potential at short distance. These findings indicate that a long-range tail of the interaction is unneeded to obtain such a phase, and that the soft-core repulsive interaction is the minimal model for supersolidity.

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