Ballistic transport: A view from the quantum theory of motion
  Ballistic transport of electrons through a quantum wire with a constriction is studied in terms of Bohm's interpretation of quantum mechanics, in which the concept of a particle orbit is permitted. The classical bouncing ball trajectories, which justify the name ``ballistic transport'', are established in the large wave number limit. The formation and the vital role of quantum vortices is investigated. 
Hua Wu and D. W. L. Sprung (Department of Physics and Astronomy,   McMaster University Hamilton, Ontario, Canada)