Abstract
Since a pioneering NMR experiment by Osheroff et al,1 it has been gradually realized that the superfluid phases of liquid 3He possess extraordinary magnetic properties. All of the extraordinary magnetic properties reflect the fact that the condensates in both the A and B phases of superfluid 3He comprise the triplet pairs as first recognized by Leggett.2,3 The ground state of superfluid 3He is highly degenerate as to the spin configuration as well as the orbital configuration of the triplet pairs. This implies that the superfluid 3He possesses a class of gapless collective modes associated with the rotation of the spin configuration (i.e., Goldstone boson). As pointed out by Leggett2,3 the dipole interaction energy between nuclear spins of He atoms, though extremely small, will lift partially the high degeneracy of the ground state. The dipole interaction introduces correlations between the orbital and the spin configuration of the condensate, giving rise to an additional shift in the NMR frequencies for example.
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© 1975 Plenum Press, New York
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Maki, K. (1975). Spin Waves and Magnetization Oscillation in Superfluid 3He. In: Trickey, S.B., Kirk, W.P., Dufty, J.W. (eds) Quantum Statistics and the Many-Body Problem. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-2208-5_11
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DOI: https://doi.org/10.1007/978-1-4684-2208-5_11
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