Josephson effect and quantum phase slippage in superfluids

O. Avenel and E. Varoquaux
Phys. Rev. Lett. 60, 416 – Published 1 February 1988
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Abstract

We describe the operation of a hydromechanical resonator immersed in He4 and B3 superfluids and opened on the main bath by two holes, a micro-orifice acting as a weak link and a long parallel channel. Transitions between adjacent quantum states differing by one hydrodynamic circulation quantum can be induced coherently, yielding a succession of steps arranged in a staircase pattern. In He3 at about 0.8 mK and 0 bar, a nearly ideal, nondissipative hydrodynamic Josephson effect can be observed.

  • Received 24 August 1987

DOI:https://doi.org/10.1103/PhysRevLett.60.416

©1988 American Physical Society

Authors & Affiliations

O. Avenel

  • Service de Physique du Solide et de Résonance Magnétique, Centre d’Etudes Nucléaires de Saclay, 91191 Gif-sur-Yvette Cedex, France

E. Varoquaux

  • Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France

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Vol. 60, Iss. 5 — 1 February 1988

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