Calculation of hydrodynamic mass for atomic impurities in helium.
Calculation of hydrodynamic mass for atomic impurities in helium.
复制标题
氦中原子杂质的流体动力学质量的计算。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
K. Lehmann
中科院分区：
文献类型：
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作者：
K. Lehmann
我们给出了一个简单的计算超流氦中围绕球形溶质的无旋转流体动力流动的数值方法。碱阳离子的计算结果与最近的多体变分蒙特卡罗（VMC）计算结果进行了比较。VMC和流体动力学方法计算的氦对Li+有效质量的贡献为12.9（4.6）比9.4 u， Na+为48.2（5.6）比52.1 u， K+为69.6（4.8）比70.1 u， Cs+为6.4（8.8）比6.8 u。在所有情况下，两个结果的一致性都在VMC计算的误差估计范围内，表明即使在原子长度尺度上，氦运动的流体力学处理也是准确的。
We present a simple numerical procedure for calculating the irrotational hydrodynamic flow around a spherical solute in superfluid helium. The results for alkali cations are compared to recent many-body variational Monte Carlo (VMC) calculations. The helium contribution to the effective masses calculated by the VMC and hydrodynamic methods are 12.9(4.6) versus 9.4 u for Li+, 48.2(5.6) versus 52.1 u for Na+, 69.6(4.8) versus 70.1 u for K+, and 6.4(8.8) versus 6.8 for Cs+. In all cases, the agreement of the two results are in within the error estimate of the VMC calculation, demonstrating the accuracy of hydrodynamic treatment of helium motion even on the atomic length scale.