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arXiv 1202.3793math-phcond-mat.stat-mechmath.MP
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弱相互作用玻色-爱因斯坦气体中Klein-Gordon场对称破缺的临界温度与凝聚温度的关系

Critical Temperature Associated to Symmetry Breaking of Klein--Gordon fields versus Condensation Temperature in a Weakly interacting Bose--Einstein Gas

Elias Castellanos, Tonatiuh Matos

摘要:

在假设谐振子型势的条件下,推导了具有单圈修正势的标量场在热浴中对称性破缺的临界温度与上述系统的凝聚温度之间的关系。我们表明,这两个温度是通过相关的系统的\emph{scale}。在这个目标中,我们推断的数量级为\emph{scale}作为相应的愈合长度的函数,以给出一个标准来比较两个温度。此外,我们证明了冷凝温度是独立的热浴内的半经典近似,为一个积极的耦合常数,假设热浴的贡献是最低的能量与系统。

英文摘要:

We deduce the relation between the critical temperature associated to the symmetry breaking of scalar fields with one--loop correction potential immersed in a thermal bath and the condensation temperature of the aforementioned system, assuming a harmonic oscillator type potential. We show that these two temperatures are related through the \emph{scale} associated to the system. In this aim, we infer the order of magnitude for the \emph{scale} as a function of the corresponding healing length, in order to give a criterium to compare both temperatures. Additionally, we prove that the condensation temperature is independent of the thermal bath within the semiclassical approximation, for a positive coupling constant, assuming that the thermal bath contribution is the lowest energy associated to the system.

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