Continuous Quantum Error Correction with two-qubit Annealing Hamiltonian

ORAL

Abstract

Adiabatic quantum computation (AQC) is expected to be robust against dephasing and control errors. Nevertheless, environmental noise on the qubits can cause transitions out of the ground state. Error suppression and correction techniques are needed to remedy this. Using an open quantum system approach, we study the effects of different noise models such as bit-flip errors and more realistic thermal noise on a two-qubit system evolving under an annealing Hamiltonian. By encoding each logical qubit using stabilizer codes, we develop a continuous error correction scheme based on the weakly measured error syndromes and analyze the efficiency of this protocol with different physical parameters. We compare the effectiveness of such error correction with known error suppression techniques.

*This material is based upon work supported by the Intelligence Advanced Research Projects Activity (IARPA) and the Army Research Office (ARO) under Contract No. W911NF-17-C-0050. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Intelligence Advanced Research Projects Activity (IARPA) and the Army Research Office (ARO).

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Presenters

  • Song Zhang

    • University of California, Berkeley
    • Berkeley Quantum Information & Computation Center, University of California, Berkeley

Authors

  • ARMAN BABAKHANI

    • Berkeley Quantum Information & Computation Center, University of California, Berkeley

  • Herman Chan

    • Berkeley Quantum Information & Computation Center, University of California, Berkeley

  • Jeffrey Epstein

    • Physics, Univ of California - Berkeley
    • Berkeley Quantum Information & Computation Center, University of California, Berkeley
    • Physics, University of California, Berkeley
    • University of California, Berkeley

  • Song Zhang

    • University of California, Berkeley
    • Berkeley Quantum Information & Computation Center, University of California, Berkeley

  • Juan Atalaya

    • University of California, Berkeley
    • Univ of California - Berkeley
    • Berkeley Quantum Information & Computation Center, University of California, Berkeley

  • Birgitta K Whaley

    • University of California, Berkeley
    • Berkeley Quantum Information & Computation Center, University of California, Berkeley
    • Univ of California - Berkeley