Quantum State Transfer Using Surface Acoustic Wave Phonons

ORAL

Abstract

Heavily used in classical signal processing, surface acoustic waves (SAWs) have also been proposed as a means to couple distant solid-state quantum systems. Several groups have reported the coherent coupling of standing SAWs modes to superconducting qubits, opening the door to the control and detection of quantum phonon states. Here, we explore the coherent coupling of superconducting qubits to propagating SAWs. The experimental device comprises a 2-mm-long SAW resonator coupled to two xmon-style qubits. The resonator operates at 4 GHz and sustains 70 standing SAW modes with a free spectral range of 2 MHz. We demonstrate that each qubit reaches the strong multi-mode regime, where the coupling to one standing mode exceeds the resonator free spectral range. We show that in this regime, each qubit can launch a propagating SAW into the resonator and capture it at a later time, showing that the SAW resonator can act as an acoustic communication channel. We perform quantum state transfer as well as remote entanglement generation between the two qubits using this acoustic channel.

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Presenters

  • Audrey Bienfait

    Institute for Molecular Engineering, University of Chicago, University of Chicago

Authors

  • Audrey Bienfait

    Institute for Molecular Engineering, University of Chicago, University of Chicago

  • Kevin Satzinger

    Physics, University of California, Santa Barbara, University of California, Santa Barbara, Department of Physics, University of California, Santa Barbara, Department of Physics, Univerity of California, Santa Barbara, UC Santa Barbara; University of Chicago, Google Inc - Santa Barbara

  • Youpeng Zhong

    Institute for Molecular Engineering, University of Chicago

  • Hung-Shen Chang

    University of Chicago, Institute for Molecular Engineering, University of Chicago

  • Ming-Han Chou

    University of Chicago, Institute for Molecular Engineering, University of Chicago

  • Christopher Conner

    University of Chicago, Institute for Molecular Engineering, University of Chicago

  • Etienne Dumur

    University of Chicago, Institute for Molecular Engineering, University of Chicago

  • Joel Grebel

    University of Chicago, Institute for Molecular Engineering, University of Chicago

  • Gregory A Peairs

    University of Chicago, Physics, University of California, Santa Barbara, University of California, Santa Barbara, Department of Physics, University of California, Santa Barbara, Department of Physics, Univerity of California, Santa Barbara, UC Santa Barbara; University of Chicago

  • Rhys G Povey

    University of Chicago, Institute for Molecular Engineering, University of Chicago

  • Andrew N Cleland

    University of Chicago, Institute for Molecular Engineering, University of Chicago