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arXiv 0910.2564cond-mat.quant-gas
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随机二聚体模型中的定域-离域跃迁

Localization-Delocalization Transition in the Random Dimer Model

Jean-François Schaff, Zehra Akdeniz, Patrizia Vignolo

摘要:

随机二聚体模型可能是一维无序系统中最流行的模型,其中相关性负责波函数的离域。这是用于证明导电聚合物和DNA中绝缘体-金属转变的主要模型。然而,对于这样的系统,局域化-离域制度,只有通过深入修改系统本身,包括无序势的关联函数观察到。在这篇文章中,我们建议使用一个超冷原子的混合物跨越过渡简单地通过外部调整种间相互作用,而不修改杂质的相关性。

英文摘要:

The random-dimer model is probably the most popular model for a one-dimensional disordered system where correlations are responsible for delocalization of the wave functions. This is the primary model used to justify the insulator-metal transition in conducting polymers and in DNA. However, for such systems, the localization-delocalization regimes have only been observed by deeply modifying the system itself, including the correlation function of the disordered potential. In this article, we propose to use an ultracold atomic mixture to cross the transition simply by externally tuning the interspecies interactions, and without modifying the impurity correlations.

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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