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Communication with a demountable quantum bus part 1

ORAL

Abstract

Modular networks are a promising paradigm for realizing increasingly complex quantum devices, but rapid and faithful communication between modules remains a challenge. In this work, the low-loss standing wave mode of a demountable, all-superconducting coaxial cable is used as a quantum bus in a simple quantum network consisting of two 3D cavity bosonic qubits housed in separate modules. We demonstrate several key networking requirements such as state transfer and entanglement generation with high fidelity, due to the all-superconducting nature of the bus and the absence of lossy directional elements (circulators). Crucially, we also implement bosonic quantum error correction techniques in the communication protocols to further mitigate photon loss. In particular, we achieve breakeven for the state transfer of multi-photon qubits when compared to the single-photon encoding and Bell state entanglement generation via two-photon interference with half the infidelity as the single-photon case.

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Presenters

  • James Teoh

    Yale University

Authors

  • James Teoh

    Yale University

  • Luke D Burkhart

    Yale University

  • Yaxing Zhang

    Yale University, Applied Physics, Yale University

  • Christopher J Axline

    ETH

  • Luigi Frunzio

    Applied Physics Department, Yale University, Yale University, Applied Physics, Yale University, Department of Applied Physics and Physics, Yale University

  • Michel Devoret

    Yale University, Applied Physics Department, Yale University, Yale, Department of Applied Physics and Physics, Yale University, Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University

  • Liang Jiang

    University of Chicago, Department of Molecular Engineering, The University of Chicago, Pritzker School of Molecular Engineering, University of Chicago, Yale University, Pritzker school of molecular engineering, The University of Chicago

  • Steven Girvin

    Yale University, Yale Quantum Institute, Yale University

  • Robert J Schoelkopf

    Yale University, Applied Physics, Yale University, Department of Applied Physics and Physics, Yale University