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The onset of superfluidity in capillary flow of liquid helium 4
Shun-ichiro Koh
The onset mechanism of superfluidity is examined by taking the case of the capillary flow of liquid helium 4. In the capillary flow, a substantial fall of the shear viscosity has b…
Shear viscosity of liquid helium 4 above the lambda point
Shun-ichiro Koh
In liquid helium 4, many features associated to Bose statistics have been masked by the strongly interacting nature of the liquid. As an example of these features, we examine the s…
Shear viscosity and Bose statistics: Capillary flow above lambda point
Shun-ichiro Koh
The gradual fall of the shear viscosity below 2.8K, observed in a liquid helium 4 flowing through a capillary, is examined. The disappearance of the shear viscosity in a capillary…
Meissner effect in a charged Bose gas with short-range repulsion
Shun-ichiro Koh
The question of whether the BEC is a necessary condition of the Meissner effect is examined. The electromagnetic susceptibility of a charged Bose gas with short-range repulsion is…