There are two qualitatively different types of solution to the Josephson barrier equations. The first type corresponds to vortex lines in the barriers. For small damping, a rather complete picture of vortex line motion can be obtained including inertial and dissipative effects. The second type of solution corresponds to plasma oscillations. The stability of the solutions is investigated and results are obtained for the collective modes of the vortex lines and the propagation of plasma oscillations in a magnetic field.

• Received 11 April 1967

DOI:https://doi.org/10.1103/PhysRev.163.376