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首页> 外文期刊>Journal of Low Temperature Physics >Spin Fluctuations in A-like Superfluid Phase of 3He in Aerogel
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Spin Fluctuations in A-like Superfluid Phase of 3He in Aerogel

机译:气凝胶中 3 He的A样超流体相的自旋涨落

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摘要

The frequency spectrum of the spin fluctuations δ S(t) superimposed on the coherently precessing spin modes in the A-like superfluid phase in aerogel is analysed. It is shown that the low amplitude spin fluctuations could be most easily observed in the case of an uni-axially deformed aerogel. It is demonstrated, in particular, that for axially stretched (radially squeezed) aerogel described by the U(1)LIM model the fourth order harmonic in δ S z (t) is erased, in contrast with what is expected for the long range Leggett orbital configuration in the 3He-A (ABM state). Keywords Superfluid 3He - Aerogel - Spin fluctuations PACS 05.07.Ln - 05.70.Jk - 64
机译:分析了气凝胶中A样超流体相中叠加在相干进动自旋模上的自旋涨落δS(t)的频谱。结果表明,在单轴变形气凝胶的情况下,最容易观察到低振幅的自旋波动。特别证明,对于由U(1)LIM模型描述的轴向拉伸(径向挤压)气凝胶,与之相比,δS z (t)中的四阶谐波被消除了。对于 3 He-A(ABM状态)的长距离Leggett轨道配置,是可以预期的。关键词超流体 3 He-气凝胶-自旋波动PACS 05.07.Ln-05.70.Jk-64

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