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Heralded photon amplification for quantum communication

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Published in Physical Review. A. 2012, vol. 86, no. 2, p. 023815-1/4
Abstract Heralded noiseless amplification based on single-photon sources and linear optics is ideally suited for long-distance quantum communication tasks based on discrete variables. We experimentally demonstrate such an amplifier, operating at telecommunication wavelengths. Coherent amplification is performed with a gain of G=1.98±0.20 for a state with a maximum expected gain G=2. We also demonstrate that there is no need for a stable phase reference between the initial signal state and the local auxiliary photons used by the amplifier. We discuss these results in the context of experimental device-independent quantum key distribution based on heralded qubit amplification, and we highlight several key challenges for its realization.
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Research group Groupe Zbinden
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OSORIO TAMAYO, Clara et al. Heralded photon amplification for quantum communication. In: Physical Review. A, 2012, vol. 86, n° 2, p. 023815-1/4. doi: 10.1103/PhysRevA.86.023815 https://archive-ouverte.unige.ch/unige:22770

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Deposited on : 2012-09-05

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