Hardware-efficient quantum memory protection

ORAL

Abstract

We propose a new method to autonomously correct for errors of a logical qubit induced by energy relaxation. This scheme encodes the logical qubit as a multi-component superposition of coherent states in a harmonic oscillator, more specifically a single cavity mode. The sequences of encoding, decoding and correction operations employ the non-linearity provided by a single physical qubit coupled to the cavity. We layout in detail how to implement these operations in a circuit QED architecture. This proposal directly addresses the task of building a hardware-efficient and technically realizable quantum memory.

*This work was partially supported by the French ``Agence Nationale de la Recherche'' under the project EPOQ2 number ANR-09-JCJC-0070 and the Army Research Office (ARO) under the project number ARO - W911NF-09-1-0514.

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Authors

  • Zaki Leghtas

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

  • Gerhard Kirchmair

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

  • Brian Vlastakis

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

  • Robert Schoelkopf

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

  • Michel Devoret

    • Applied Physics Department, Yale University

  • Mazyar Mirrahimi

    • INRIA Paris-Rocquencourt / Applied Physics Department, Yale University