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arXiv 2401.09272cond-mat.stat-mechmath-phmath.MP
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量子流体的热力学几何

Quantum Fluids in Thermodynamic Geometry

L. F. Escamilla-Herrera, J. L. López-Picón, José Torres-Arenas, Alejandro Gil-Villegas

AI总结:

本文利用热力学几何研究量子硬球流体和半经典方阱流体,揭示量子效应可消除经典硬球流体的曲率反常,并刻画了半经典R-Widom线。

摘要:

本文分析了量子流体的热力学几何。我们给出了两个模型的结果。第一个模型是量子硬球流体,其亥姆霍兹自由能由路径积分蒙特卡洛模拟获得。研究发现,由于热力学势中的量子贡献,经典硬球流体在热力学几何中出现的与标量曲率符号相关的反常现象,现在在热力学空间的相当大区域内得以避免。第二个模型是半经典方阱流体,由量子硬球排斥相互作用与经典吸引方阱贡献耦合描述。针对若干吸引势范围,分析了半经典曲率标量作为热德布罗意波长λ_B的函数的行为,并得到了由曲率标量极大值定义的半经典R-Widom线的描述,同时与不同方阱范围下的经典结果进行了比较。

英文摘要:

In this work, the Thermodynamic Geometry (TG) of quantum fluids (QF) is analyzed. We present results for two models. The first one is a quantum hard-sphere fluid (QHS) whose Helmholtz free energy is obtained from Path Integrals Monte Carlo simulations (PIMC). It is found that due to quantum contributions in the thermodynamic potential, the anomaly found in TG for the classical hard-sphere fluid related to the sign of the scalar curvature, is now avoided in a considerable region of the thermodynamic space. The second model is a semi-classical square-well fluid (QSW), described by a quantum hard-sphere repulsive interaction coupled with a classical attractive square-well contribution. Behavior of the semi-classical curvature scalar as a function of the thermal de Broglie wavelength $λ_B$ is analyzed for several attractive-potential ranges, and description of the semi-classical R-Widom lines defined by the maxima of the curvature scalar, are also obtained and compared with classical results for different square-well ranges.

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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