Geodesic
Molecular hydrodynamics of weakly degenerate nonideal bose-gas II. Green functions and kinetic coefficients
Teoretičeskaâ i matematičeskaâ fizika, Tome 105 (1995) no. 1, pp. 77-129 
Yu. A. Tserkovnikov. Molecular hydrodynamics of weakly degenerate nonideal bose-gas II. Green functions and kinetic coefficients. Teoretičeskaâ i matematičeskaâ fizika, Tome 105 (1995) no. 1, pp. 77-129. http://geodesic.mathdoc.fr/item/TMF_1995_105_1_a5/
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     title = {Molecular hydrodynamics of weakly degenerate nonideal {bose-gas~II.~Green} functions and kinetic coefficients},
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     url = {http://geodesic.mathdoc.fr/item/TMF_1995_105_1_a5/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

The nonideal degenerate Bose-system at a temperature close to zero is investigated by N. N. Bogolyubov and D. N. Zubarev's method of collective variables. Applicable to a wide range of frequencies and wave vectors, interpolated expressions for the Green functions of the densities of conserved quantities and for the superfluid velocity potential are derived from exact relations. The criteria defining the validity domain of the hydrodynamic approximation are obtained. The kinetic coefficients of two-liquid hydrodynamics at temperatures close to zero are calculated for a weakly nonideal Bose-gas. A comparison with the method employing the kinetic equation for quasi-particles is made.

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