Universal contact for a Tonks-Girardeau gas at finite temperature.
Universal contact for a Tonks-Girardeau gas at finite temperature.
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有限温度下 Tonks-Girardeau 气体的通用接触。
DOI：
10.1103/physrevlett.110.020403
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发表时间：
2012
影响因子：
8.6
通讯作者：
A. Minguzzi
中科院分区：
文献类型：
--
作者：
P. Vignolo;A. Minguzzi
我们确定了有限温度下的强相互作用的一维玻色气体的动量分布在Tonks-Girardeau（不可穿透玻色子）限制下的谐波约束，并探讨其普遍性质与模型的标度不变性。我们表明，在不同的酉费米气体在三维空间中，其大动量尾巴的重量-由谭的接触-随着温度的增加，并计算高温通用第二接触系数使用维里膨胀。
We determine the finite-temperature momentum distribution of a strongly interacting 1D Bose gas in the Tonks-Girardeau (impenetrable-boson) limit under harmonic confinement and explore its universal properties associated to the scale invariance of the model. We show that, at difference from the unitary Fermi gas in three dimensions, the weight of its large-momentum tails--given by Tan's contact--increases with temperature and calculate the high-temperature universal second contact coefficient using a virial expansion.