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New measurements of parallel ringing in a quasi-ideal geometry for 3He-B near the temperature and pressure of the polycritical point suggest fB2/fA2∼5/2, where fB and fA are the linear parallel-ringing frequencies at a given temperature near Tc. This result approaches the prediction of theory using the Anderson-Brinkman-Morel and Balian-Werthamer states to describe 3He-A and 3He-B, respectively, and hence the results of Osheroff at melting pressure, but disagrees with earlier observations at pressures near the polycritical point.


Webb, R. A., Sager, R. E., & Wheatley, J. C. (1975). Relationship between the linear frequencies in 3He-A and 3He-B near the polycritical point. Physical Review Letters, 35(9), 615-617. DOI: 10.1103/PhysRevLett.35.615

© Physical Review Letters, 1975, American Physical Society

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