On the Equation of Motion of Superfluid Velocity
Abstract
It is shown how the ``classical'' equations of motion for the condensate can be obtained exactly from microscopic theory. We deal with genuinely inhomogeneous cases of a Bose fluid. We have obtained the effective action functional, from which as the Euler-Lagrange equation the ``classical'' equations for the condensate are derived. We have derived the fundamental equation of motion for the superfluid velocity, which can be applied even on spatial scales of the size of a vortex core.
- Publication:
-
Progress of Theoretical Physics
- Pub Date:
- July 1981
- DOI:
- 10.1143/PTP.66.1
- Bibcode:
- 1981PThPh..66....1I