caa a22 4500 469034955 CHVBK 20180323132753.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF01016395 doi (NATIONALLICENCE)springer-10.1007/BF01016395 Tserkovnikov Yu aut Molecular hydrodynamics of degenerate weakly nonideal bose gas. I. Generalized equations of two-fluid hydrodynamics [Elektronische Daten] [Yu. Tserkovnikov] A degenerate weakly nonideal Bose gas is investigated at temperatures near zero. Relations connecting the irreducible Green's functions are used to obtain exact expressions for the two-time temperature-dependent Green's functions. In the case of weak nonideality an expression possessing interpolation properties with respect to the frequency and momentum is obtained for the density—density Green's function. At low frequencies, the results of two-fluid hydrodynamics are reproduced. At wavelengths less than the mean free path the energy of the elementary excitations and the damping obtained in the paper agree with the results of perturbation theory with respect to the coupling constant. An expression for the operator of the superfluid velocity is obtained. Plenum Publishing Corporation, 1993 Theoretical and Mathematical Physics Kluwer Academic Publishers-Plenum Publishers 93/3(1992-12-01), 1367-1402 0040-5779 93:3<1367 1992 93 11232 https://doi.org/10.1007/BF01016395 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01016395 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Tserkovnikov Yu aut NATIONALLICENCE 773 0- Theoretical and Mathematical Physics Kluwer Academic Publishers-Plenum Publishers 93/3(1992-12-01), 1367-1402 0040-5779 93:3<1367 1992 93 11232 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer