Id Quantique Sa

Dartmouth College

Id Quantique

Damien Stucki

Matthieu Legré

Eric R Fossum

Jiaju Ma

Grégoire Ribordy

Yacine Felk

Emna Amri

Matthieu LegrÉ

Some embodiments provide methods and apparatus for quantum random number generation based on a single bit or multi bit Quanta Image Sensor (QIS) providing single-photon counting over a time interval for each of an array of pixels of the QIS, wherein random number data is generated based on the number of photons counted over the time interval for each of the pixels.

Quanta image sensor quantum random number generation

An apparatus for enhancing secret key rate exchange over quantum channel in QKD systems includes an emitter system with a quantum emitter and a receiver system with a quantum receiver, wherein both systems are connected by a quantum channel and a service communication channel. User interfaces within the systems allow to define a first quantum channel loss budget based on the distance to be covered between the quantum emitter and the quantum receiver and the infrastructure properties of the quantum channel as well as a second quantum channel loss budget associated to the loss within the realm of the emitter system. The emitter system is adapted to define the optimal mean number of photons of coherent states to be emitted based on the first and the second quantum channel loss budgets.

Apparatus and method for enhancing secret key rate exchange over quantum channel in quantum key distribution systems

The invention relates to a QKD System Active combiner () adapted to be installed in a QKD apparatus, said QKD apparatus comprising an emitter (), a receiver () and QKD systems (), wherein the emitter () is adapted to send communication signals to the receiver () through the QKD System Active combiner (), characterized in that the QKD System Active combiner () comprises an active attenuation system comprising a processing unit () adapted to automatically control at least one variable optical attenuator () through a control channel () in order to control an attenuation of a signal to be sent to the receiver, and a detector/monitor () adapted to monitor the intensity of the signal downstream the attenuation, and wherein the processing unit is adapted to control the variable optical attenuator () based on a QBER information or an intensity of a signal received by the receiver, sent by the QKD systems () through a classical channel ().

Apparatus and method for direct quantum cryptography system implementation over WDM telecommunication network

Growing community of inventors

Carouge, Switzerland

Damien Stucki