Berry phase modification of the current drive in a restricted class of large annular Josephson junctions at low temperature

Frank Gaitan

doi:10.1103/PhysRevB.63.104511

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Berry phase modification of the current drive in a restricted class of large annular Josephson junctions at low temperature

Frank Gaitan

DOI 10.1103/PhysRevB.63.104511 · Physical Review B

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Abstract

We examine how Berry’s phase influences the motion of vortices in a restricted class of large annular Josephson junctions at sufficiently low temperatures. We show that the essential physical effect produced is a modulation of the tunnel current density passing through the junction which, however, leaves the total current through the junction unaffected. The tunnel current density modulation is seen to produce a spatially inhomogeneous modification of the current drive which acts on a vortex residing in an annular junction of this restricted type. We discuss the circumstances under which this current drive modification vanishes, and provide an estimate of the temperature at which its effects will be masked by spectral flow.