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.

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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