Shear viscosity of the B phase of superfluid3He |
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Authors: | Yoshimasa A. Ono Jun'ichiro Hara Katsuhiko Nagai Kiyoshi Kawamura |
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Affiliation: | (1) Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, Japan;(2) Department of Physics, Yamaguchi University, Yamaguchi, Japan;(3) Department of Materials Science, Hiroshima University, Hiroshima, Japan |
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Abstract: | The shear viscosity (T) in the Balian-Werthamer (BW) state of superfluid3He is calculated variationally throughout the region 0t 1(t=T/Tc) from the transport equation for Bogoliubov quasiparticles. Coherence factors are treated exactly in the calculation of the collision integral. The numerical result for=s= s(T)/n(Tc) agree very well with experiment in the range 0.8t1.0. Analytic expressions = 0.577 (1–1.0008t) and=1–(23/64) [=(T)/kBT] are obtained in the low-temperature region and in the vicinity ofTc, respectively. From the numerical analysis it is shown that the latter equation is valid only in the temperature range 0.9997t1.0.Supported by the Research Institute for Fundamental Physics, Kyoto University. |
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