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Memory effects in quantum information transmission across a Hamiltonian dephasing channel

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Abstract.

We study a dephasing channel with memory, modelled by a multimode environment of oscillators. Focusing on the case of two channel uses, we show that memory effects can enhance the amount of coherent quantum information transmitted down the channel. We also propose a coding-decoding scheme that takes advantage of memory to improve the fidelity of transmission.

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Authors and Affiliations

  1. Catania & Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria, Università degli Studi di Catania, MATIS, CNR-INFM, Viale Andrea Doria 6, 95125, Catania, Italy

    A. D'Arrigo & G. Falci

  2. CNISM, CNR-INFM & Center for Nonlinear and Complex Systems, Universita' degli Studi dell'Insubria, via Valleggio 11, 22100, Como, Italy

    G. Benenti

  3. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, via Celoria 16, 20133, Milano, Italy

    G. Benenti

Authors
  1. A. D'Arrigo
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  2. G. Benenti
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  3. G. Falci
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Correspondence to A. D'Arrigo.

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D'Arrigo, A., Benenti, G. & Falci, G. Memory effects in quantum information transmission across a Hamiltonian dephasing channel. Eur. Phys. J. Spec. Top. 160, 83–94 (2008). https://doi.org/10.1140/epjst/e2008-00712-1

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  • DOI: https://doi.org/10.1140/epjst/e2008-00712-1

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