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arXiv 1106.4971cond-mat.quant-gas
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一维相互作用二分量玻色子的平衡热力学性质

Equilibrium thermodynamic properties of interacting two-component bosons in one dimension

Antoine Klauser, Jean-Sébastien Caux

摘要:

在一维玻色子双组分理论框架下,研究了量子统计、相互作用和温度之间的相互作用。我们数值求解热力学Bethe Anglands并获得状态方程作为温度和相互作用强度的函数,相对化学势和总化学势或固定数量的粒子,允许量化系统在其低温铁磁和高温非极化制度之间的完全交叉行为,在强相互作用下,从低耦合退相干区到费米化区。

英文摘要:

The interplay of quantum statistics, interactions and temperature is studied within the framework of the bosonic two-component theory with repulsive delta-function interaction in one dimension. We numerically solve the thermodynamic Bethe Ansatz and obtain the equation of state as a function of temperature and of the interaction strength, the relative chemical potential and either the total chemical potential or a fixed number of particles, allowing to quantify the full crossover behaviour of the system between its low-temperature ferromagnetic and high-temperature unpolarized regime, and from the low coupling decoherent regime to the fermionization regime at high interaction.

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