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arXiv 0902.3404cond-mat.stat-mech
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玻色玻璃的玻璃特性

Glassy features of a Bose Glass

P. Buonsante, F. Massel, V. Penna, A. Vezzani

摘要:

本文研究了零温下具有随机局域势的二维玻色-哈伯德模型,其中存在均匀无序和二元无序。许多低能亚稳组态被发现与基态具有几乎相同的能量。它们的特点是,原则上,复杂的非零局部序参量与基态具有相同的斑点图案。然而,与基态不同,每个岛呈现出总体随机独立的相位。不同相干岛中的不同相位可以进一步解释玻色玻璃实验中观察到的相干性缺乏。

英文摘要:

We study a two-dimensional Bose-Hubbard model at a zero temperature with random local potentials in the presence of either uniform or binary disorder. Many low-energy metastable configurations are found with virtually the same energy as the ground state. These are characterized by the same blotchy pattern of the, in principle, complex nonzero local order parameter as the ground state. Yet, unlike the ground state, each island exhibits an overall random independent phase. The different phases in different coherent islands could provide a further explanation for the lack of coherence observed in experiments on Bose glasses.

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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