Long distance quantum communication using continuous variable encoding

ORAL

Abstract

Quantum communication enables faithful quantum state transfer between different parties and protocols for cryptographic purposes. However, quantum communication over long distances (\textgreater 1000km) remains challenging due to optical channel attenuation. This calls for investigation on developing novel encoding schemes that correct photon loss errors efficiently. In this talk, we introduce the generalization of multi-component Schr\"{o}dinger cat states [1] and propose to encode quantum information in these cat states for ultrafast quantum repeaters [2,3]. We detail the quantum error correction procedures at each repeater station and characterize the performance of this novel encoding scheme given practical imperfections, such as coupling loss. A comparison with other quantum error correcting codes for bosonic modes will be discussed. [1] M. Mirrahimi, Z. Leghtas, V. V. Albert, S. Touzard, R. J. Schoelkopf, L. Jiang, and M. H. Devoret, New J. Phys. 16, 045014 (2014). [2] S. Muralidharan, J. Kim, N. L\"{u}tkenhaus, M. D. Lukin, and L. Jiang, Phys. Rev. Lett. 112, 250501 (2014). [3] S. Muralidharan, L. Li, J. Kim, N. L\"{u}tkenhaus, M. D. Lukin, and L. Jiang, arXiv:1509.08435

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Authors

  • Linshu Li

    Yale University

  • Victor V. Albert

    Yale University, Departments of Physics and Applied Physics, Yale University

  • Marios Michael

    Cambridge University, Departments of Physics and Applied Physics, Yale University

  • Sreraman Muralidharan

    Yale University

  • Changling Zou

    Yale University, Yale Univ

  • Liang Jiang

    Yale University, Departments of Physics and Applied Physics, Yale University, Yale University, Department of Applied Physics, Yale University Department of Applied Physics, Yale Univ