A modular quantum computer based on a parametrically driven quantum state router

ORAL

Abstract

For superconducting quantum computers, most efforts seek to implement a “surface code” architecture, which only couples nearest-neighbor qubits. In such a computer, operations between distant qubits require a large number of nearest-neighbor gates to implement with concomitant increases in gate errors and run time. In contrast, a modular architecture allows for long-range couplings between distant qubits. We have realized a modular quantum state router based on three-wave couplings with all-to-all couplings between 4 modules. We have connected the router to four simple modules consisting of a high Q communication cavity which couples to the router, a single transmon qubit and a readout cavity to demonstrate feasibility of operating the router + module systems as a quantum machine. In this talk, we will demonstrate basic operations in our machine: transferring states and generating entanglement among the modules’ communication modes and qubits. Furthermore, we will discuss the potential for utilizing ancillary modes in the router as ancillary quantum storage, as well as expanding the router system to form a large scale quantum router for an arbitrary number of modules.

*Work supported by the AFOSR, the Kauffman Foundation, ARO and LPS.

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Presenters

  • Pinlei Lu

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

Authors

  • Pinlei Lu

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

  • Chao Zhou

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

  • Mingkang Xia

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

  • Tzu-Chiao Chien

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

  • Ryan Kaufman

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

  • Xi Cao

    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

  • David Pekker

    • Department of Physics and Astronomy, University of Pittsburgh
    • Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh

  • Roger Mong

    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

  • Wolfgang Pfaff

    • University of Illinois at Urbana-Champaign
    • Department of Physics, University of Illinois Urbana-Champaign
    • University of Illinois Urbana-Champaign

  • Michael Jonathan Hatridge

    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh
    • Physics and Astronomy, University of Pittsburgh