Aharonov-Bohm–Type Effect for Vortices in Josephson-Junction Arrays

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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.
Original languageEnglish
Pages (from-to)255-258
JournalPhysical Review Letters
Issue number2
Publication statusPublished - 9-Jul-1990
Externally publishedYes

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