Nonlinear Temperature Profiles near the Superfluid Transition
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概要
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Temperature profiles are calculated near the superfluid transition in the presence of a heat flow in the normal, superfluid and coexisting phases. In particular, in the neighborhood of the HeI-HeII interface, vortices on the superfluid side give rise to a temperature gradient much smaller than that on the normal fluid side by a factor ε_m(〜10^<-3>). As a result the predicted temperature depression T_λ-T on the superfluid side is measurable only when the size of a thermometer is smaller than ξ_c/ε_m〜10^<-1>Q^<-1/2> cm with Q in mW /cm^2, ξ_c being the interfacial thickness of order 3×10^<-5>Q^<-1/2> cm. Therefore, the mutual friction can have a significant effect in measurements of temperatures near the interface, which appears to explain the discrepancy between the theory and Bhagat and Lasken's measurement.
- 理論物理学刊行会の論文
- 1983-10-25
著者
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Onuki Akira
Research Institute For Fundamental Physics Kyoto University
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ONUKI Akira
Research Institute for Fundamental Physics, Kyoto University
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