Shear viscosity of the B phase of superfluid3He. II.s-p-d-wave approximation

✍ Scribed by Jun'ichiro Hara; Yoshimasa A. Ono; Katsuhiko Nagai; Kiyoshi Kawamura

• Publisher: Springer US
• Year: 1980
• Tongue: English
• Weight: 708 KB
• Volume: 39
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00114897

✦ Synopsis

The shear viscosity rl(T) of superfluid 3He-B is studied throughout the temperature region 0 ~< t ~< 1 (t = T/To). The Boltzmann equation for Bogoliubov-Valatin quasiparticles is solved by a variational method. In the calculation of the collision integral, the scattering amplitude is estimated in the s-p-d-wave approximation by taking into account the spin-dependent part as well as the spin-independentpart. The reduced shear viscosity (I = 7I(T)/~I(Tc) in this approximation is smaller than those in the s-wave and s-p-wave approximations at all temperatures. The numerical result for r in the s-p-dwave approximation is in good agreement with the recent experimental data of Parpia et al. and of Alvesalo et al. in the temperature range 0.5 <~ t <~ 1.0.