Condensed Matter Physics, 2009, vol. 12, No. 4, pp. 657663
DOI:10.5488/CMP.12.4.657
Title:
Microscopic construction of the twofluid model for superfluid helium4
Author(s):

P. Shygorin
(Volyn National University of Lesia Ukrainka, Lutsk 43025, Avenue Voli, 13, Ukraine)
,


A. Svidzynskyj
(Volyn National University of Lesia Ukrainka, Lutsk 43025, Avenue Voli, 13, Ukraine)

Using a system of Heisenberg's equation of motion for both the normal and the anomalous correlation functions a twofluid hydrodynamics for superfluid helium4 was constructed. The method is based on a gradient expansion of the exact equations of motion for correlation functions about a local equilibrium together with explicit use of the local equilibrium statistical operator for superfluid helium in the frame of reference, where condensate is in the state of rest.
Key words:
twofluid hydrodynamics, correlation function, superfluid helium, statistical operator
PACS:
67.25.dg
