Aharonov-Bohm–type effect for vortices in Josephson-junction arrays
B. J. van Wees
DOI 10.1103/PhysRevLett.65.255 · Physical Review Letters
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Abstract
The dynamics of a single vortex present in a ring-shaped (Corbino geometry) two-dimensional array of low-capacity Josephson junctions is studied. The vortex is treated as a macroscopic quantum particle, whose energy levels En(Q0) are periodic functions of the externally induced gauge charge Q0 which is enclosed by the vortex, with a period 2e. This Aharonov-Bohm–type effect may manifest itself as a persistent voltage Vs=dE0(Q0)/dQ0 between interior and exterior contacts, or alternatively as Bloch oscillations. The relation with the Aharonov-Casher effect and the possibility for experimental observation are discussed.
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