Imaginary Squashing Mode Spectroscopy of Helium Three B

Details Imaginary Squashing Mode Spectroscopy of Helium Three B Imaginary Squashing Mode Spectroscopy of Helium Three B

2006-06-29

arxiv.org/abs/cond-mat/0606783v2

J. Low Temp. Phys. 148, 501 (2007).

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures, submitted to proceedings of Quantum Fluids and Solids (QFS) Conference 2006; revised 9/26/06

Scientific paper

10.1007/s10909-007-9417-7

We have made precision measurements of the frequency of a collective mode of the superfluid 3He-B order parameter, the J=2- imaginary squashing mode. Measurements were performed at multiple pressures using interference of transverse sound in an acoustic cavity. Transverse waves propagate in the vicinity of this order parameter mode owing to off-resonant coupling. At the crossing of the sound mode and the order parameter mode, the sound wave is strongly attenuated. We use both velocity and attenuation measurements to determine precise values of the mode frequency with a resolution between 0.1% and 0.25%.

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