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Phenomenological Theory of Superfluid 4He
3He 4He Mixtures
Vortices and Ions in Helium
5 other sections not shown
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approximation assumed atoms basis becomes behavior calculation coefficient concentration condition consider consistent constant contains contribution core correction correlation corresponding curve defined density dependence derivatives detailed determined direct discussed diverges dynamics effect energy equal equation equilibrium exchange excitations expansion expected experimental experiments expression factor field Figure fluid follows frequency given gives helium hydrodynamic increases integral interaction leads Lett light limit liquid mass matrix measurements mixtures modes momentum motion normal observed obtained parameters particle phase phonon Phys Physics possible potential predicted present pressure properties pure quantum recent Reference region relation remains respect ring roton scattering second sound shown singular solid solution sound spectrum superfluid surface temperature theoretical theory thermal thermodynamic tion transition velocity volume vortex wave function yields zero