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arXiv 0808.1806cond-mat.other
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超流He3-B中涡旋附近热激发的弹道传播

Ballistic propagation of thermal excitations near a vortex in superfluid He3-B

C. F. Barenghi, Y. A. Sergeev, N. Suramlishvili

摘要:

热激发的Andreev散射是研究超流He 3-B中低温量子化涡旋和湍流的有力工具。我们写的准粒子在涡线的存在下,汉密尔顿的方程,确定其轨迹,并发现在哪些条件下,它是Andreev反映。为了与实验联系,我们将我们的结果推广到昂萨格涡旋气体,并发现涡间间距的值与不太严格的估计一致。

英文摘要:

Andreev scattering of thermal excitations is a powerful tool for studying quantized vortices and turbulence in superfluid He3-B at very low temperatures. We write Hamilton's equations for a quasiparticle in the presence of a vortex line, determine its trajectory, and find under wich conditions it is Andreev reflected. To make contact with experiments, we generalize our results to the Onsager vortex gas, and find values of the intervortex spacing in agreement with less rigorous estimates.

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