Motions in a bose condensate : VI . Vortices in a nonlocal model

  title={Motions in a bose condensate : VI . Vortices in a nonlocal model},
  author={Natalia G. Berloff and Paul H. Roberts},
Nonlocal nonlinear Schr ödinger equations are considered as models of liquid helium II. The models contain a nonlocal interaction potential that leads to a phonon–roton-like dispersion relation. Also, a higher-order term in the local density approximation for the correlation energy is introduced into the model to overcome nonphysical mass concentrations. These equations are solved for straight-line vortices. It is demonstrated that the parameters of the equation can be chosen to bring into… CONTINUE READING


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