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Quantum interference of currents in an atomtronic SQUID

Author

Listed:
  • C. Ryu

    (Los Alamos National Laboratory)

  • E. C. Samson

    (Los Alamos National Laboratory
    Miami University)

  • M. G. Boshier

    (Los Alamos National Laboratory)

Abstract

Quantum interference of currents is the most important and well known quantum phenomenon in a conventional superconducting quantum interference device (SQUID). Here, we report the observation of quantum interference of currents in an atomtronic SQUID. Analogous to a conventional SQUID, currents flowing through two junctions in an atomtronic SQUID interfere due to the phase difference from rotation. This interference results in modulation of critical currents. This modulation was observed for three different radii with clear modulation periods which were measured to be consistent with fundamental rotation rates. This observation shows the possibility of studying various interesting SQUID physics with an atomtronic SQUID and especially, macroscopic quantum phenomena with currents may be realized with an atomtronic SQUID toward the goal of quantum metrology of rotation sensing.

Suggested Citation

  • C. Ryu & E. C. Samson & M. G. Boshier, 2020. "Quantum interference of currents in an atomtronic SQUID," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17185-6
    DOI: 10.1038/s41467-020-17185-6
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    Cited by:

    1. Luca Pezzè & Klejdja Xhani & Cyprien Daix & Nicola Grani & Beatrice Donelli & Francesco Scazza & Diego Hernandez-Rajkov & Woo Jin Kwon & Giulia Del Pace & Giacomo Roati, 2024. "Stabilizing persistent currents in an atomtronic Josephson junction necklace," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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