Abstract:
A functional integral method developed earlier is used to find the hydrodynamic Hamiltonian
of a nonideal Bose gas and to construct a perturbation theory that is free of divergences at
small energies and momenta. The kinetic equations at low temperatures are considered.
The coefficient of first viscosity is calculated in quadratures.
\Bibitem{Pop72}
\by V.~N.~Popov
\paper Hydrodynamic Hamiltonian for a nonideal Bose gas
\jour TMF
\yr 1972
\vol 11
\issue 2
\pages 236--247
\mathnet{http://mi.mathnet.ru/tmf2855}
\transl
\jour Theoret. and Math. Phys.
\yr 1972
\vol 11
\issue 2
\pages 478--486
\crossref{https://doi.org/10.1007/BF01028563}
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