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arXiv 0810.3065cond-mat.supr-con
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平行平板间旋转超流3 He-A中半量子涡旋的稳定性

Stability of half quantum vortex in rotating superfluid 3He-A between parallel plates

T. Kawakami, Y. Tsutsumi, K. Machida

摘要:

我们发现了超流$^3$ He A相在旋转条件下受限于窄间隙平行平板中的半量子涡旋的精确稳定区域。标准的Ginzburg-Landau自由能,这是很好地建立,解决了定位的温度$T$和转速($/Omega$)跨越的稳定区域。该$/Omega$ - $T$稳定性区域足够宽以在可用的实验装置中通过实验对其进行检查。给出了以$_1$核为特征的HQV的详细序参量结构,以便于解释其相对于其他涡旋或织构稳定性的物理原因。

英文摘要:

We have found the precise stability region of the half quantum vortex (HQV) for superfluid $^3$He A phase confined in parallel plates with a narrow gap under rotation. Standard Ginzburg-Landau free energy, which is well established, is solved to locate the stability region spanned by temperature $T$ and rotation speed ($/Omega$). This $/Omega$-$T$ stability region is wide enough to check it experimentally in available experimental setup. The detailed order parameter structure of HQV characterized by A$_1$ core is given to facilitate the physical reasons of its stability over other vortices or textures.

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