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Quantum interference of superfluid 3He

Author

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  • R. W. Simmonds

    (University of California)

  • A. Marchenkov

    (University of California)

  • E. Hoskinson

    (University of California)

  • J. C. Davis

    (University of California)

  • R. E. Packard

    (University of California)

Abstract

Celebrated interference experiments have demonstrated the wave nature of light1 and electrons2, quantum interference being the manifestation of wave–particle duality. More recently, double-path interference experiments have also demonstrated the quantum-wave nature of beams of neutrons3, atoms4 and Bose–Einstein condensates5. In condensed matter systems, double-path quantum interference is observed in the d.c. superconducting quantum interference device6 (d.c. SQUID). Here we report a double-path quantum interference experiment involving a liquid: superfluid 3He. Using a geometry analogous to the superconducting d.c. SQUID, we control a quantum phase shift by using the rotation of the Earth, and find the classic interference pattern with periodicity determined by the 3He quantum of circulation.

Suggested Citation

  • R. W. Simmonds & A. Marchenkov & E. Hoskinson & J. C. Davis & R. E. Packard, 2001. "Quantum interference of superfluid 3He," Nature, Nature, vol. 412(6842), pages 55-58, July.
    • Handle: RePEc:nat:nature:v:412:y:2001:i:6842:d:10.1038_35083518
    DOI: 10.1038/35083518
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