Demonstration of a Fault-Tolerant Error Syndrome Measurement: Results

ORAL

Abstract

Forward propagation of ancilla errors onto logical qubits can counteract the effects of quantum error correction. Here, we show how in-situ control of the interaction Hamiltonian eliminates back-action of ancilla errors onto the logical qubit. We realize such an engineered interaction between a transmon ancilla and cavity-encoded logical qubit, and use it to implement a fault-tolerant photon-number parity measurement. We achieve a significant reduction of the error propagation rate compared to the non fault-tolerant implementation. This is a significant milestone towards fault-tolerant quantum computation, showing that fault tolerance can be implemented hardware-efficiently by exploiting physically relevant error models.

*This research was supported by the U.S. Army Research Office (W911NF-14-1-0011).

–

Presenters

  • Serge Rosenblum

    • Yale University
    • Applied Physics, Yale University
    • Applied Physics, Yale Univ

Authors

  • Serge Rosenblum

    • Yale University
    • Applied Physics, Yale University
    • Applied Physics, Yale Univ

  • Philip Reinhold

    • Applied Physics, Yale Univ
    • Yale University
    • Applied Physics, Yale University
    • Dept. of Applied Physics, Yale University

  • Mazyar Mirrahimi

    • Applied Physics, Yale Univ
    • Yale University
    • Inria and Yale Quantum Institute
    • Yale Quantum Institute, Yale University, New Haven, CT, United States; INRIA
    • INRIA Paris
    • QUANTIC team, INRIA de Paris
    • 3. INRIA Paris and Yale Quantum Institute

  • Nissim Ofek

    • Applied Physics, Yale Univ
    • Yale University

  • Liang Jiang

    • Applied Physics, Yale Univ
    • Yale University
    • Department of Physics and Applied Physics, Yale University
    • Yale Univ
    • Applied Physics, Yale University
    • Department of Applied Physics, Yale University
    • Dept. of Applied Physics, Yale University
    • Yale Quantum Institute, Yale University

  • Luigi Frunzio

    • Yale University
    • Applied Physics, Yale University
    • Physics and Applied Physics, Yale University
    • Applied Physics, Yale Univ
    • Dept. of Applied Physics, Yale University
    • Department of Applied Physics, Yale Univ
    • Yale Univ
    • Departments of Applied Physics and Physics, Yale University

  • Michel Devoret

    • Yale University
    • Applied Physics, Yale University
    • Department of Applied Physics, Yale University
    • Applied Physics, Yale Univ
    • Physics and Applied Physics, Yale University
    • Yale Univ
    • Dept. of Applied Physics, Yale University
    • Department of Applied Physics, Yale Univ

  • Robert Schoelkopf

    • Yale University
    • Applied Physics, Yale University
    • Physics and Applied Physics, Yale University
    • Applied Physics, Yale Univ
    • Dept. of Applied Physics, Yale University
    • Departments of Applied Physics and Physics, Yale University