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A complete characterization of the heralded noiseless amplification of photons

Published inNew journal of physics, vol. 15, no. 9, 093002
Publication date2013
Abstract

Heralded noiseless amplification of photons has recently been shown to provide a means to overcome losses in complex quantum communication tasks. In particular, to overcome transmission losses that could allow for the violation of a Bell inequality free from the detection loophole, for device independent quantum key distribution (DI-QKD). Several implementations of a heralded photon amplifier have been proposed and the first proof of principle experiments realized. Here we present the first full characterization of such a device to test its functional limits and potential for DI-QKD. This device is tested at telecom wavelengths and is shown to be capable of overcoming losses corresponding to a transmission through 20 km of single mode telecom fibre. We demonstrate heralded photon amplifier with a gain >100 and a heralding probability >83%, required by DI-QKD protocols that use the Clauser–Horne–Shimony–Holt inequality. The heralded photon amplifier clearly represents a key technology for the realization of DI-QKD in the real world and over typical network distances.

Citation (ISO format)
BRUNO, Natalia et al. A complete characterization of the heralded noiseless amplification of photons. In: New journal of physics, 2013, vol. 15, n° 9, p. 093002. doi: 10.1088/1367-2630/15/9/093002
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ISSN of the journal1367-2630
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