Theory of generalized Josephson effects

Abstract

The DC Josephson effect is the flow of supercurrent across a weak link between two superconductors with a different value of their order parameter, the phase. We generalize this notion to any kind of spontaneous continuous symmetry breaking. The quantity that flows between the two systems is identified as the Noether current associated with the broken symmetry. The AC Josephson effect is identified as the oscillations due to the energy difference between the two systems caused by an imposed asymmetric chemical potential. As an example of novel physics, a Josephson effect is predicted between two crystalline solids, potentially measurable as a force periodic in the separation distance.

RevTeX, 5 pages, 2 figures

References in corpus (6)

• Counting rule for Nambu-Goldstone modes in nonrelativistic systems
• Spin Josephson effect in ferromagnet/ferromagnet tunnel junctions
• Vacuum induced phonon transfer between two solid dielectric materials: Illustrating the case of Casimir force coupling
• AC Josephson effect without superconductivity
• Field theoretic description of the abelian and non-abelian Josephson effect
• Generalized DC and AC Josephson effects in antiferromagnets and in antiferromagnetic d-wave superconductors

Cited by in corpus (5)

• An Introduction to Spontaneous Symmetry Breaking
• Deformations, relaxation and broken symmetries in liquids, solids and glasses: a unified topological field theory
• Oscillating Solitons and AC Josephson Effect in Ferromagnetic Bose-Bose Mixtures
• Monopole Josephson Effects in a Dirac Spin Liquid
• Intercomponent entanglement entropy and spectrum in binary Bose-Einstein condensates