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Noiseless loss suppression in quantum optical communication

par Mičuda, Michal;Straka, Ivo;Miková, Martina;Dušek, Miloslav;Cerf, Nicolas ;Fiurasek, Jaromir ;Ježek, Miroslav
Référence Physical review letters, 109, 18, 180503
Publication Publié, 2012-11

Article révisé par les pairs

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Résumé :

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. © 2012 American Physical Society.