Noiseless Loss Suppression in Quantum Optical Communication

M. Mičuda, I. Straka, M. Miková, M. Dušek, N. J. Cerf, J. Fiurášek, and M. Ježek
Phys. Rev. Lett. 109, 180503 – Published 2 November 2012

Abstract

We propose a protocol for conditional suppression of losses in direct quantum state transmission over a lossy quantum channel. The method works by noiselessly attenuating the input state prior to transmission through a lossy channel followed by noiseless amplification of the output state. The procedure does not add any noise; hence, it keeps quantum coherence. We experimentally demonstrate it in the subspace spanned by vacuum and single-photon states, and consider its general applicability.

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  • Received 14 June 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.180503

© 2012 American Physical Society

Authors & Affiliations

M. Mičuda1, I. Straka1, M. Miková1, M. Dušek1, N. J. Cerf2, J. Fiurášek1, and M. Ježek1

  • 1Department of Optics, Palacký University, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
  • 2Quantum Information and Communication, Ecole Polytechnique de Bruxelles, CP 165/59, Université Libre de Bruxelles, 1050 Brussels, Belgium

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Vol. 109, Iss. 18 — 2 November 2012

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