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arXiv 0905.4790math-phmath.MP
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关于无序系统中玻色-爱因斯坦凝聚的性质

On the nature of Bose-Einstein condensation in disordered systems

Thomas Jaeck, Joseph V. Pulé, Valentin Zagrebnov

摘要:

研究了理想玻色气体在随机外势中的情况,证明了在随机本征态中存在广义玻色-爱因斯坦凝聚的充要条件是在单粒子动能本征态中也存在广义玻色-爱因斯坦凝聚,这与自由玻色气体的广义凝聚相对应.此外,我们证明了两个凝聚密度的数量相等。我们的方法是基于一个明确的公式的推导占领措施的单体动能本征态,它描述了这些非随机状态之间的粒子的再分配。这种技术可以适用于重新检查的性质的完美玻色气体中存在的弱(标度)的非随机电位,我们建立了类似的结果。

英文摘要:

We study the perfect Bose gas in random external potentials and show that there is generalized Bose-Einstein condensation in the random eigenstates if and only if the same occurs in the one-particle kinetic-energy eigenstates, which corresponds to the generalized condensation of the free Bose gas. Moreover, we prove that the amounts of both condensate densities are equal. Our method is based on the derivation of an explicit formula for the occupation measure in the one-body kinetic-energy eigenstates which describes the repartition of particles among these non-random states. This technique can be adapted to re-examine the properties of the perfect Bose gas in the presence of weak (scaled) non-random potentials, for which we establish similar results.

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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