Centre National De La Recherche Scientifique

Universitè De Genève

Université De Nice Sophia Antipolis

Anthony Christophe Mickaël Martin

Hugo Zbinden

Olivier Alibart

Laurent Labonte

Nicolas Brunner

Joseph Bowles

Sébastien Tanzilli

Virginia D'Auria

Jonatan Brask

The invention is directed to a Quantum Random Number Generator comprising an emitting device () triggered by a signal representing an input bit x and adapted to generate and send a physical system () characterized by one of two possible quantum states determined by said input bit x, a measurement device () adapted to detect said physical system, to identify the quantum state of said physical system through an unambiguous state discrimination measurement and to generate an output b first representing whether the quantum state has been identified or not and, if it has been identified, which quantum state among the two possible quantum states was detected by the unambiguous state discrimination measurement to a processing device (), the processing device () being adapted to estimate the entropy of the output b given the probabilities p(b|x) representing the probability of observing output b for a state preparation x, and a randomness extraction device () adapted to extract final random bit stream given the entropy estimate provided by the processing device ().

Method and device for quantum random number generation

A device and a method for synchronizing entanglement sources with optical pump in a quantum communication network are disclosed. The device includes a pulsed optical source allowing emission of telecom wavelength optical clock pulses distributed in parallel to the entanglement sources to ensure synchronization of the entanglement sources; and for each of the entanglement sources, a frequency conversion device, allowing frequency conversion of the distributed telecom wavelength optical clock pulses to a wavelength adapted to optically pump the entanglement source. The method includes emitting and distributing in parallel, to the entanglement sources, telecom wavelength optical clock pulses; and locally, at each of the entanglement sources, frequency converting the telecom wavelength optical clock pulses to a wavelength adapted to optically pump the entanglement source.

Method and device for synchronizing entanglement sources for a quantum communication network

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Nice, France

Anthony Christophe Mickaël Martin