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Protecting quantum information with entanglement and noisy optical modes

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Abstract

We incorporate active and passive quantum error-correcting techniques to protect a set of optical information modes of a continuous-variable quantum information system. Our method uses ancilla modes, entangled modes, and gauge modes (modes in a mixed state) to help correct errors on a set of information modes. A linear-optical encoding circuit consisting of offline squeezers, passive optical devices, feedforward control, conditional modulation, and homodyne measurements performs the encoding. The result is that we extend the entanglement-assisted operator stabilizer formalism for discrete variables to continuous-variable quantum information processing.

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Authors and Affiliations

  1. Communication Sciences Institute, Center for Quantum Information Science and Technology, Department of Electrical Engineering, University of Southern California, Los Angeles, CA, 90089, USA

    Mark M. Wilde & Todd A. Brun

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  1. Mark M. Wilde
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  2. Todd A. Brun
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Correspondence to Mark M. Wilde.

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Wilde, M.M., Brun, T.A. Protecting quantum information with entanglement and noisy optical modes. Quantum Inf Process 8, 401–413 (2009). https://doi.org/10.1007/s11128-009-0117-x

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  • DOI: https://doi.org/10.1007/s11128-009-0117-x

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