The QuReP Partners

The QuReP consortium have been informally collaborating for the last few years and it is the fruits of this that have given rise to the concept of the atomic frequency comb (AFC) multimode quantum memories that is at the heart of this proposal. The consortium competencies extend from fundamental aspects of spectroscopy (CNRS-LCMCP) to three groups that have already shown AFC memory functionality in different systems (UNIGE, CNRS-LAC, ULUND), who provide the necessary expertise and human resources needed for advancing the key technology of multimode Quantum Memories. UPB is probably the leading applied physics groups in Europe working on integrated photonic sources based on nonlinear (periodically poled) materials. They have also previously developed rare earth ion memories in waveguides. Their unique capabilities provide an ideal avenue for bridging the wavelength difference between these materials based Quantum Memories and the targeted fibre optic networks. UNIGE is one of the few groups in Europe, and indeed the world, whose expertise covers all aspects of quantum communication, from detectors, photon sources, and Quantum Memories to the theory of quantum communication architectures and security. As such, UNIGE is ideally placed to bring this consortium together and lead it towards the development of a quantum repeater with the potential for industrialisation.

It is this vision for quantum repeaters capable of being integrated in existing fibre optic networks that provides a focal point for the QuRep efforts. The importance of an industrial partner such as idQ, who are the world leaders in the commercialisation of quantum communication technologies, cannot be understated. idQ have a proven experience in industrialising advanced quantum technologies and are ready to exploit the next generation of entanglement enabled technologies that should arise from such a project. As such, the participants represent the leading groups in Europe in this field and are ideally suited to achieving QuRep’s objectives.

The University of Geneva

The Group of Applied Physics (GAP) at the University of Geneva, part of the Swiss National Center of Competence in Research in Quantum Photonics (NCCR-QP), focuses on quantum communication, quantum optics, quantum theory and metrology. It currently consists of 25 members. It has demonstrated long distance quantum entanglement and teleportation and is one of the pioneers in the field of Quantum Key Distribution. Being an applied physics group, it has developed competencies for bridging the gap between fundamental research and commercialisation with many successful start-ups emerging from the group over the last 20 years. We also have ongoing collaborations with several ICT industrial partners (EXFO, HP). GAP has extensively participated in EC projects, of which some are listed below. GAP has been developing quantum communication systems for many years and recently demonstrated quantum key distribution over 200km of installed telecom fibres, high-efficiency photon pair sources and quantum state storage in Quantum Memories. This provides us with the necessary capacities to not only take the important role of leading this project, but to bring together the diverse competencies needed to make it a success.

The University of Lund

The Quantum Information group at the department of Physics at Lund University belongs to the Lund Laser Centre (LLC). The LLC is established at the Lund University, directly under the Rectorate, as an organization for laser, optics and spectroscopy research. LLC is a European Major Research Infrastructure and belongs to LASERLAB-EUROPE the Integrated Initiative of European Laser Infrastructures. The Quantum Information group consists of 5 persons. Recent work has focussed on the development of hardware for quantum computers and quantum memories based on rare-earth-ion doped inorganic crystals. As part of LLC, the group has access to an extensive optics equipment park including 30 major laser systems. Equipment within the group include a kHz line width continuous-wave stabilized single-mode ring dye laser system, diode lasers and diode laser drivers, high magnetic field cryostat and extensive tailor-made software for coherent experiments in rare-earth materials.

CNRS: There are two CNRS laboratories involved in the QuREP project, namely, LAC and the LCMCP, which are represented by the CNRS. Moreover, the LCMCP is a joint research unit which involves the Université Pierre et Marie Curie (UPMC). Consequently the CNRS has the UPMC as a third party

Laboratoire Aimé Cotton (LAC)

Laboratoire Aimé Cotton (LAC) is a research unit fully operated by CNRS. This 100 people laboratory has a rich history in atomic physics and spectroscopy. LAC is the place where modern Fourier Transform spectroscopy was born half a century ago. The team involved in the present project is presently comprised of 7 persons, which includes permanent researchers and PhD students. This group has a long-standing experience in time-resolved coherent interaction of light with atomic systems. Photon echo can be considered as emblematic of such processes. Starting with atomic vapors in the eighties, the team evolved towards dye molecules embedded in polymers and rare earth ion doped crystals. Many coherent transient aspects have been investigated at the LAC, ranging from basic research to electronic warfare applications. Indeed, based on academic research findings, a fruitful collaboration has developed with the THALES Company, leading to disruptive solutions, especially for Radar Warning Receiver applications using rare earth ion doped crystals. Over the years, the team gained international recognition in the field, as illustrated by supports awarded by the European Space Agency, the IST European Program and even the American Office of Naval Research.

Ecole Nationale Supérieure de Chimie de Paris (LCMCP)

Ecole Nationale Supérieure de Chimie de Paris: The "materials for photonics group" of the CNRS (LCMCP) has a strong experience in crystal growth for optical applications including laser, non-linear and scintillating materials. High performance crystals like GdCOB, Ce3+:LPS or Yb3+:CALGO have been discovered here. Various growth equipments are available in the group to produce high quality samples. The team involved in the project specifically develops rare earth doped crystals, characterization techniques and theoretical tools for quantum information applications. For example, long Raman coherence lifetime and electromagnetically induced transparency in a highly spin concentrated crystal has been recently demonstrated. To characterize the samples, the team has built a coherent optical spectroscopy set-up and has also access to an electron paramagnetic resonance spectrometer to characterize the samples. The influence of a magnetic field on rare earth ions levels has been thoroughly studied allowing for prediction of optimal orientation in Tm:YAG for example. The team has been supported by several national programs and a European project.

Université Pierre et Marie Curie (UPMC)

Université Pierre et Marie Curie: The UPMC is the leading French scientific and medical university with around 30000 students and 3200 teaching academics and researchers. UPMC is hosting about 160 laboratories most of them in partnership with the CNRS. UPMC is composed of seven departments and faculties: chemistry, engineering, mathematics, medicine, physics, life sciences, earth sciences, environment and biodiversity. It is located in the center of Paris. The facilities of relevance for the QuReP project are shared with the CNRS (LCMCP).

University of Paderborn

The Applied Physics group (currently about 15 members including Ph.D. students) of the University of Paderborn is one of the leading groups in the field of Lithium Niobate (LN) based integrated optics. The group has more than 20 years experiences in the field of LN integrated optics. It developed a wide range of devices including Er-diffusion doped waveguide lasers like actively Q-switched, mode-locked, tunable and ultra- narrow linewidth lasers, electro-optic devices like modulators, ultrafast optical spectrum analysers, and PMD compensators, and wavelength-tuneable acousto-optical devices (filters, switches, add-drop multiplexers, ...). In recent years a strong focus has been on integrated nonlinear optical devices based on (cascaded) χ(2)- interactions in periodically poled LN (PPLN). Frequency doublers, sum frequency generators, (cascaded) difference frequency mixers for fixed and tuneable wavelength conversion of data channels, and optical parametric oscillators for the near (NIR) and mid-infrared (MIR) spectral ranges have been developed. Moreover, coupled waveguide arrays have been demonstrated in PPLN for spatial soliton generation and all- optical switching.

ID Quantique

ID Quantique is a profitable Swiss company focusing on providing innovative and cost-effective solutions by leveraging the tremendous capabilities offered by Quantum Photonics. The company designs and manufactures hardware products serving three main markets: network encryption, quantum random number generators and optical instrumentation. The company has a global leadership in shaping these markets. It was for example the first to commercialise a quantum cryptography system and a quantum random number generator in 2001. More recently, in 2007, it demonstrated a first real world application of quantum cryptography by securing a connection used by the Geneva government in election ballot counting. In 2008, id Quantique was also the first company to have its quantum random number generator certified by a national laboratory, the Swiss Federal Office of Metrology. It is also the world leader in single-photon detection based on avalanche photodiodes, with a broad product portfolio covering both the visible and infrared spectrum. The company is one of the recipients of the 2001 European Innovation Award from the Wall Street Journal Europe, as well as of the 2002 and 2004 Swiss Technology Award, in recognition for its pioneering work in the field of Quantum Cryptography. ID Quantique currently has fifteen employees in its Geneva offices, two third of which are engineers and scientists active in R&D. It serves customers in the United States, Canada, Europe, Asia-Pacific, Latin America and the Middle East, which benefit from the company's commitment to technology leadership, its culture of innovation, its product reliability, its attention to customer service and its independence.