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arXiv 0706.2125cond-mat.other
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$^{\bf 4}$ He液滴中的量子涡旋:量子Monte Carlo研究

Quantized vortices in $^{\bf 4}$He droplets: a quantum Monte Carlo study

E. Sola, J. Casulleras, J. Boronat

摘要:

本文用扩散蒙特卡罗方法研究了零温下附着在$^4$ He液滴中心的涡线激发。涡旋能量的原子数增加的液滴,从N=70到300,显示出单调的增加与$N$。的核心半径和它的相关能量,核心能量的演变,也研究了作为一个功能的$N$。核心半径在中心为$\sim 1$ ε,当接近液滴表面时增加;对于$N \ge 200$,每单位体积的核心能量稳定在2.8 K $σ^{-3}$($σ=2.556$ ε)。

英文摘要:

We present a diffusion Monte Carlo study of a vortex line excitation attached to the center of a $^4$He droplet at zero temperature. The vortex energy is estimated for droplets of increasing number of atoms, from N=70 up to 300 showing a monotonous increase with $N$. The evolution of the core radius and its associated energy, the core energy, is also studied as a function of $N$. The core radius is $\sim 1$ Åin the center and increases when approaching the droplet surface; the core energy per unit volume stabilizes at a value 2.8 K$σ^{-3}$ ($σ=2.556$ Å) for $N \ge 200$.

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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