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arXiv 0812.3417cond-mat.dis-nncond-mat.stat-mech
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无序诱导超流性

Disorder-induced superfluidity

Long Dang, Massimo Boninsegni, Lode Pollet

摘要:

我们利用量子蒙特卡罗模拟研究了在均匀对角无序存在下,具有短程{ \it吸引}相互作用的硬核玻色子的相图。结果表明,适度的无序稳定的玻璃超流相的吸引力的相互作用的范围内的值,该系统是一个莫特绝缘体,在没有障碍。随着无序或相互作用的强度增加,发生向绝缘玻色玻璃相的转变。

英文摘要:

We use quantum Monte Carlo simulations to study the phase diagram of hard-core bosons with short-ranged {\it attractive} interactions, in the presence of uniform diagonal disorder. It is shown that moderate disorder stabilizes a glassy superfluid phase in a range of values of the attractive interaction for which the system is a Mott insulator, in the absence of disorder. A transition to an insulating Bose glass phase occurs as the strength of the disorder or interactions increases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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