ABSTRACT
In the preceding chapters, we have discussed at length the longitudinal oscillations of a superfluid Bose liquid. We now focus our attention on “steady” superfluid flow, in which the superfluid velocity, vs, satisfies the equation d i υ v s = 0 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429495717/2cc6e3e4-f702-48c8-b407-59783ef3d6a6/content/eq332_v2.tif"/>
