NMR Frequency Shifts and Phase Identification in Superfluid 3 He
NMR Frequency Shifts and Phase Identification in Superfluid 3 He
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超流体 3 He 中的 NMR 频移和相识别
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通讯作者：
M. Marriott
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作者：
D. Karius;M. Marriott
超液态~ 3 He中序参量的压力依赖性非常简单.在金斯堡-朗道政权中，即，在接近Tc时，序参量的平方可以通过其与NMR频移的比例性来精确测量，并且在压力下严格线性。这种行为是复制的超级超流体3 He吸收各向同性和各向异性二氧化硅气凝胶。比例因子受超超流体态的对称性约束，是相应超流体相的重要特征。为了识别p波流形中各种新的超流体态，超流体3 He-A的序参量振幅是一个有用的参考，这种简单的压力依赖性大大有助于识别。
The pressure dependence of the order parameter in superfluid 3 He is amazingly simple. In the Ginzburg–Landau regime, i.e., close to T c , the square of the order parameter can be accurately measured by its proportionality to NMR frequency shifts and is strictly linear in pressure. This behavior is replicated for superfluid 3 He imbibed in isotropic and anisotropic silica aerogels. The proportionality factor is constrained by the symmetry of the superfluid state and is an important signature of the corresponding superfluid phase. For the purpose of identifying various new superfluid states in the p -wave manifold, the order parameter amplitude of superfluid 3 He-A is a useful reference, and this simple pressure dependence greatly facilitates identification.