Geneva, Switzerland
Geneva, Switzerland

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A reconfigurable and timely accurate method of generating, with a low latency, an output signal in response to multiple input signals, wherein said input signals occur at independent times, and wherein the occurrence of several input signals according to predetermined pattern is interpreted as a Super Event (SE) and wherein a detected Super Event triggers the production of a specific output signal heralding this SE, characterized in that said method comprises a first step (310) of time acquisition of the occurrence of said input signals, a second step (320) of adaptation of the acquisition data flow to the clock of the reconfigurable processing unit, a third step (330) of determining the occurrence of a Super Event (SE) by comparing the events pattern to the super event definition, a fourth step (340) identifying the Super Event and generating at least one event/signal corresponding to at least one trigger signal, a fifth step (350) of adaptation of the generation data flow to the asynchronous generation device, a sixth step (360) of applying a predefined delay for the issue of the at least one trigger signal, and an seventh step (370) of outputting at least one output signal representing a trigger signal and sending it to a downstream unit.


The invention relates to a Quantum Key Distribution apparatus (200), for exchanging at least one quantum key with another Quantum Key Distribution apparatus, comprising a Random Number Generator (110) for generating a random bit signal, an electronic driver (140) for transforming a digital signal into an analog signal, an optical platform (150), receiving the signal from the driver, for exchanging, through a quantum channel (170), said quantum key, a clock (120) for synchronizing the working of the QKD apparatus, characterized in that said apparatus comprises an External Random Number Generator input adapted to receive an external random bit generated by an External Random Number Generator (220) connected to said Quantum Key Distribution apparatus, a RNG mixer (210) for receiving outputs from the Random Number Generator and the External Random Number Generator input and generating a random bit signal based on the combination of said outputs, said RNG mixer being disposed downstream the processing unit.


A reconfigurable and timely accurate method of generating, with a low latency, an output signal in response to multiple input signals, wherein said input signals occur at independent times, and wherein the occurrence of several input signals according to predetermined pattern is interpreted as a Super Event and wherein a detected Super Event triggers the production of a specific output signal heralding this Super Event, characterized in that said method comprises a first step of time acquisition of the occurrence of said input signals, a second step of adaptation of the acquisition data flow to the clock of the reconfigurable processing unit, a third step of determining the occurrence of a Super Event by comparing the events pattern to the super event definition, a fourth step identifying the Super Event and generating at least one event/signal corresponding to at least one trigger signal, a fifth step of adaptation of the generation data flow to the asynchronous generation device, a sixth step of applying a predefined delay for the issue of the at least one trigger signal, and an seventh step of outputting at least one output signal representing a trigger signal and sending it to a downstream unit.


A QKD system used to securely exchange encryption keys between an emitter (100) and a receiver (200) modified to accept an additional customization parameter. Said QKD system consists of a QKD transmitter (120) and a QKD receiver (220) capable of implementing a plurality of QKD protocols forming a family of protocols. The QKD transmitter (120) and receiver (220) connected through a quantum channel (500) consist of optical and electronic components adapted to produce and detect a stream of qubits. The qubits (520) exchanged over the quantum channel (500) are grouped into blocks (510) consisting of at least one qubit and whose length is L_(i) (511). For each, block (510) of qubits (520), one of the QKD protocol (530), selected from the family of protocols can be implemented using the emitter (100) and transmitter (200) is used.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2011.9.9 | Award Amount: 11.78M | Year: 2013

The overarching goal of our project is to develop systems based on direct and deterministic interactions between individual quantum entities, which by involving large-scale entanglement can outperform classical systems in a series of relevant applications.\nWe plan to achieve that by improving technologies from atomic, molecular and optical physics as well as from solid-state physics, and by developing new ones, including combinations across those different domains. We will explore a wide range of experimental platforms as enabling technologies: from cold collisions or Rydberg blockade in neutral atoms to electrostatic or spin interactions in charged systems like trapped ions and quantum dots; from photon-phonon interactions in nano-mechanics to photon-photon interactions in cavity quantum electrodynamics and to spin-photon interactions in diamond color centers.\nWe will work on two deeply interconnected lines to build experimentally working implementations of quantum simulators and of quantum interfaces. This will enable us to conceive and realize applications exploiting those devices for simulating important problems in other fields of physics, as well as for carrying out protocols outperforming classical communication and measurement systems.


Grant
Agency: European Commission | Branch: H2020 | Program: MSCA-ITN-ETN | Phase: MSCA-ITN-2015-ETN | Award Amount: 3.92M | Year: 2016

Quantum Communications for ALL (QCALL) endeavors to take the next necessary steps to bring the developing quantum technologies closer to the doorsteps of end users. Quantum communications (QC) is well-known for its offering ultra-secure cryptographic key-exchange schemesresilient to any future technological advancement. QCALL will empower a nucleus of researchers in this area to provide secure communications in our continent and, in the long run, to our connections worldwide. With the large scale violations of privacy in the EU exchange of information, this is a crucial moment to pursue this objective. By covering a range of projects, with short, mid, and long-term visions, and using a balanced and multifaceted training programme, QCALL trains a cadre of highly qualified interdisciplinary workforce capable of shaping the R&D section of the field, hence accelerating its widespread adoption. This will ensure that EU will remain at the frontier of research on secure communications and advanced QC systems and devices. In QCALL, we explore the challenges of integrating quantum and classical communication networks; this will be essential in providing cost-efficient services. We experimentally examine and theoretically study new protocols by which network users can exchange secure keys with each other. We investigate disruptive technologies that enable wireless access to such quantum networks, and develop new devices and protocols that enable multi-party QC. Our meticulously planned training programme includes components from shared taught courses through to scientific schools and complementary-skill workshops, supplemented by secondment opportunities and innovative outreach and dissemination activities. This will create a structured model for doctoral training in EU that will last beyond the life of the project, so will the industry-academic collaborations that are essential to the development of the disruptive technologies that will make QC available to ALL.


Cryogenic device comprising at least two chambers at two different temperatures, a first chamber at a first temperature T1 accommodating a sample, and a second chamber at a second temperature T2 greater than T1 and being adapted to accommodate a cooling device, said cooling device being adapted to cool wirelines connecting said sample to an external element detector, wherein said cooling device is an IMS thermalization plate comprising at least one wire-guide having an input for plugging a wire line connected to the sample and an output for plugging a wire line connected to said external element, said wire-guide being thermally connected to the first chamber.


A method for providing eavesdropping detection of an optic fiber communication between two users comprises the steps of exchanging both data and probe signals through at least two channels (400, 500) between the users, exchanging probe signals (143) on one channel (500 or 400) between quantum probe signal terminals, extracting a key for authentication from the probe signals, exchanging data signals (142) between transmission units on another channel (400 or 500). A first portion of the key generated by the quantum probe signal terminals is used to authenticate the terminals, wherein a second portion of the key is dedicated to define commutation occurrences of commutation devices adapted to commutate the use of the channels (400, 500) for data (142) and probe (143) signals, thus detecting an eavesdropping event (300) which triggers an alarm (750). A further portion of the key can be used to encrypt said messages.


A method for providing eavesdropping detection of an optic fiber communication between two users includes the steps of exchanging both data and probe signals through at least two channels (400, 500) between the users, exchanging probe signals (143) on one channel (500 or 400) between quantum probe signal terminals, extracting a key for authentication from the probe signals, and exchanging data signals (142) between transmission units on another channel (400 or 500). A first portion of the key generated by the quantum probe signal terminals is used to authenticate the terminals, wherein a second portion of the key is dedicated to define commutation occurrences of commutation devices adapted to commutate the use of the channels (400, 500) for data (142) and probe (143) signals, thus detecting an eavesdropping event (300) which triggers an alarm (750). A further portion of the key can be used to encrypt the messages.


A method and device for generating random numbers based on an optical process of quantum nature. According to one exemplary aspect, the method includes randomly emitting photons from a light source and absorbing the emitted photons by a photon sensor having a plurality of pixels. Furthermore, respective minimum entropy levels can be calculated for each of the pixels of the photon sensor and a randomness extractor can be associated with each of pixels based on the calculated minimum entropy level of that pixel. After this calibration, the method and device generates a number of high-entropy bits used for generating a random number.

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