Observation of the Aharonov-Casher effect for vortices in Josephson-junction arrays
Abstract
We have observed quantum interference of vortices in a Josephson-junction array. When vortices cross the array along a doubly connected path, the resultant resistance oscillates periodically with an induced charge enclosed by the path. This phenomenon is a manifestation of the Aharonov-Casher effect. The period of oscillation corresponds to the single electron charge due to tunneling of quasiparticles.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 1993
- DOI:
- 10.1103/PhysRevLett.71.2311
- Bibcode:
- 1993PhRvL..71.2311E
- Keywords:
-
- 74.50.+r;
- 03.65.Bz;
- Tunneling phenomena;
- point contacts weak links Josephson effects