Abstract
By setting up an experiment with a static A-B boundary stabilised by a magnetic field, we have been able to cool the liquid to the regime where the A-phase excitation gas is almost one-dimensional. We have measured the damping of a vibrating wire resonator in the A-phase while simultaneous measuring the damping in the B-phase. The response in the A-phase is found to follow an exponential temperature dependence and not a power law as might be naively expected. This effect is a result of the bending of the texture by the wire which excludes a large fraction of the bulk low energy excitations from the surface.
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References
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Fisher, S.N., Guénault, A.M., Kennedy, C.J. et al. The one-dimensional excitation gas in superfluid3He-A at very low temperatures. J Low Temp Phys 89, 481–484 (1992). https://doi.org/10.1007/BF00694068
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DOI: https://doi.org/10.1007/BF00694068