Shear viscosity of the B phase of superfluid3He期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Shear viscosity of the B phase of superfluid3He

Authors:	Yoshimasa A Ono Jun'ichiro Hara Katsuhiko Nagai Kiyoshi Kawamura

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

Abstract:	The shear viscosity (T) in the Balian-Werthamer (BW) state of superfluid³He is calculated variationally throughout the region 0t 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 $\tilde \eta$ =_s= _s(T)/_n(T_c) agree very well with experiment in the range 0.8t1.0. Analytic expressions $\tilde \eta$ = 0.577 (1–1.0008t) and $\tilde \eta$ =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 0.9997t1.0.Supported by the Research Institute for Fundamental Physics, Kyoto University.

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