Quantum Information Processing

, Volume 8, Issue 5, pp 401–413 | Cite as

Protecting quantum information with entanglement and noisy optical modes

Article

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.

Keywords

Operator quantum error correction Stabilizer formalism Entanglement-assisted quantum error correction Continuous variables Linear-optical quantum computation 

PACS

03.67.-a 03.67.Hk 42.50.Dv 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Communication Sciences Institute, Center for Quantum Information Science and Technology, Department of Electrical EngineeringUniversity of Southern CaliforniaLos AngelesUSA

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