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arXiv 0906.0333math-phcond-mat.quant-gasmath.MP
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二维玻色气体临界点的S-矩阵方法

Critical point of the two-dimensional Bose gas: an S-matrix approach

Pye-Ton How, Andre' LeClair

摘要:

本文对二维相互作用玻色气体的临界点提出了一种新的处理方法。在最低阶近似下,我们得到了临界温度T_c ~ 2 πn/[ m \log(2π/mg)],其中n为密度,m为质量,g为耦合。这一结果是基于一个新的制定相互作用的气体在有限的密度和温度,这是令人想起的热力学贝特在一维的anasterian。在这种形式主义中,基本的热力学量用伪能来表示。两体散射的一致性重建导致一个积分方程的赝能量与核的基础上的对数的确切的两体S-矩阵。

英文摘要:

A new treatment of the critical point of the two-dimensional interacting Bose gas is presented. In the lowest order approximation we obtain the critical temperature T_c ~ 2 πn/[ m \log (2π/mg)], where n is the density, m the mass, and g the coupling. This result is based on a new formulation of interacting gases at finite density and temperature which is reminiscent of the thermodynamic Bethe ansatz in one dimension. In this formalism, the basic thermodynamic quantities are expressed in terms of a pseudo-energy. Consistent resummation of 2-body scattering leads to an integral equation for the pseudo-energy with a kernel based on the logarithm of the exact 2-body S-matrix.

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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