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Observation of spin-space quantum transport induced by an atomic quantum point contact

Author

Listed:
  • Koki Ono

    (Kyoto University)

  • Toshiya Higomoto

    (Kyoto University)

  • Yugo Saito

    (Kyoto University)

  • Shun Uchino

    (Japan Atomic Energy Agency)

  • Yusuke Nishida

    (Tokyo Institute of Technology)

  • Yoshiro Takahashi

    (Kyoto University)

Abstract

Quantum transport is ubiquitous in physics. So far, quantum transport between terminals has been extensively studied in solid state systems from the fundamental point of views such as the quantized conductance to the applications to quantum devices. Recent works have demonstrated a cold-atom analog of a mesoscopic conductor by engineering a narrow conducting channel with optical potentials, which opens the door for a wealth of research of atomtronics emulating mesoscopic electronic devices and beyond. Here we realize an alternative scheme of the quantum transport experiment with ytterbium atoms in a two-orbital optical lattice system. Our system consists of a multi-component Fermi gas and a localized impurity, where the current can be created in the spin space by introducing the spin-dependent interaction with the impurity. We demonstrate a rich variety of localized-impurity-induced quantum transports, which paves the way for atomtronics exploiting spin degrees of freedom.

Suggested Citation

  • Koki Ono & Toshiya Higomoto & Yugo Saito & Shun Uchino & Yusuke Nishida & Yoshiro Takahashi, 2021. "Observation of spin-space quantum transport induced by an atomic quantum point contact," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27011-2
    DOI: 10.1038/s41467-021-27011-2
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    References listed on IDEAS

    as
    1. Ariel Sommer & Mark Ku & Giacomo Roati & Martin W. Zwierlein, 2011. "Universal spin transport in a strongly interacting Fermi gas," Nature, Nature, vol. 472(7342), pages 201-204, April.
    2. Jing Li & Chris Papadopoulos & Jimmy Xu, 1999. "Growing Y-junction carbon nanotubes," Nature, Nature, vol. 402(6759), pages 253-254, November.
    3. Sebastian Krinner & David Stadler & Dominik Husmann & Jean-Philippe Brantut & Tilman Esslinger, 2015. "Observation of quantized conductance in neutral matter," Nature, Nature, vol. 517(7532), pages 64-67, January.
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