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 superfluid
3
He is calculated variationally throughout the region 0 t 1(t=T/T
c) 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 0.8 t 1.0. Analytic expressions
= 0.577 (1–1.0008t) and
=1–(23 /64) = (T)/k
B
T] are obtained in the low-temperature region and in the vicinity ofT
c, respectively. From the numerical analysis it is shown that the latter equation is valid only in the temperature range 0.9997 t 1.0.Supported by the Research Institute for Fundamental Physics, Kyoto University. |
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Keywords: | |
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