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Path-integral and Ornstein-Zernike study of quantum fluid structures on the crystallization line

机译:结晶线上量子流体结构的路径积分和Ornstein-Zernike研究

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Liquid neon, liquid para-hydrogen, and the quantum hard-sphere fluid are studied with path integral Monte Carlo simulations and the Ornstein-Zernike pair equation on their respective crystallization lines. The results cover the whole sets of structures in the r-space and the k-space and, for completeness, the internal energies, pressures and isothermal compressibilities. Comparison with experiment is made wherever possible, and the possibilities of establishing k-space criteria for quantum crystallization based on the path-integral centroids are discussed. In this regard, the results show that the centroid structure factor contains two significant parameters related to its main peak features (amplitude and shape) that can be useful to characterize freezing. (C) 2016 AIP Publishing LLC.
机译:利用路径积分蒙特卡罗模拟和各自的结晶线上的Ornstein-Zernike对方程研究了液态氖,液态对氢和量子硬球流体。结果涵盖了r空间和k空间中的整个结构集,并且为完整起见,还涵盖了内部能量,压力和等温压缩性。尽可能与实验进行比较,并讨论了基于路径积分质心为量子结晶建立k空间准则的可能性。在这方面,结果表明,质心结构因子包含两个与其主要峰特征(振幅和形状)相关的重要参数,可用于表征冻结。 (C)2016 AIP出版有限责任公司。

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