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Abstract Magneto-acoustic rotation of transverse waves in 3 He-B

By J. A. Sauls A, Y. Lee B, T. M. Haard A, W. P. Halperin A and Λn Λs


In superfluid 3 He-B, the off-resonant coupling of the J = 2 − , M = ±1 order parameter collective modes to transverse current excitations stabilizes propagating transverse waves with low damping for frequencies above that of the J = 2 − modes. Right- (RCP) and left circularly polarized (LCP) transverse modes are degenerate in zero field; however, a magnetic field with H||q lifts this degeneracy giving rise to the acoustic analog of circular birefringence and an acoustic Faraday effect for linearly polarized transverse sound waves [1]. We present theoretical results for the temperature, pressure and field dependence of the Faraday rotation angle, and compare the theory with recent measurements [2]. The analysis provides a direct measurement of the Landé g-factor for the J = 2 − modes, and new information on the magnitude of f-wave pairing correlations in 3 He-B

Year: 1999
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