Abstract
Recent NMR experiments on superfluid 3He in an aerogel suggest that the superfluid phase found might be different from the A and B phases present in the bulk. Theoretical calculations indicate that the polar phase is the leading alternative candidate. In the present paper we derive the hydrodynamics of the polar phase. We study the influence of the magnetic dipole interaction and of a weak external magnetic field including the k = 0 dynamics relevant for NMR. It turns out that cw NMR experiments can be used to distinguish the polar phase from the A phase provided one can orient the preferred direction of the polar phase in real space parallel and perpendicular to the container walls of an experimental cell. We also examine the influence of the presence of the aerogel on the reversible and dissipative hydrodynamics generalizing earlier work on superfluid 4He in aerogels.
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Kopf, A., Brand, H.R. Macroscopic Dynamics of the Polar Phase in Superfluid 3He. J Low Temp Phys 109, 183–204 (1997). https://doi.org/10.1007/s10909-005-0083-3
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DOI: https://doi.org/10.1007/s10909-005-0083-3