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arXiv 0710.4865cond-mat.mes-hallcond-mat.supr-connucl-th
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配对模型的精确介观关联函数

Exact mesoscopic correlation functions of the pairing model

Alexandre Faribault, Pasquale Calabrese, Jean-Sebastien Caux

摘要:

本文研究了正则系综中Richardson对模型(也称为约化或离散态BCS模型)的静态关联函数。利用代数Bethe Anglesia的形式主义,我们得到精确的表达式,很容易数值计算的配对强度的任何值,直到大量的粒子。我们提供了明确的结果,在半填充和广泛讨论其有限尺寸标度的行为。

英文摘要:

We study the static correlation functions of the Richardson pairing model (also known as the reduced or discrete-state BCS model) in the canonical ensemble. Making use of the Algebraic Bethe Ansatz formalism, we obtain exact expressions which are easily evaluated numerically for any value of the pairing strength up to large numbers of particles. We provide explicit results at half-filling and extensively discuss their finite-size scaling behavior.

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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