TO BE UPDATED |
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Project Partners in PROSPIQ:
The main goal of the PROSPIQ project is to use single-photon sources, already demonstrated by the project partners, in order to carry out several quantum communication protocols. The teams involved in the project have had a pioneering role in the development of such single-photon sources. They demonstrated them experimentally using different types of single emitters : a single fluorescent molecule embedded in an organic host matrix, a single photoluminescent colour centre in diamond, and a single trapped atom in an optical tweezer. The PROSPIQ project gathers these teams, with the goals of improving further these single-photon sources, and most importantly to use them in two types of quantum communication protocols : a compact free-space Quantum Key Distribution (QKD) testbed, and the generation of entangled states between atoms and photons, by exploiting interference effects between photons emitted in the same spatio-temporal mode. Project Partners in SEQURE:
The main goal of the project SEQURE is to develop a complete system capable of performing fast data encryption over an installed fibre optics link, with extremely high security standards, guaranteed by the fact that the key renewal is realized via Quantum Key Distribution (QKD). The project gathers two industrial partners and two academic partners, in order to develop and implement all aspects of a high-speed encrypted link, from quantum security proofs and hardware, up to network protocols for fast renewal of the secret keys used for symmetric encryption Project Partners in QZEC:
We consider the zero-error capacity of quantum channels, i.e. the capacity with which quantum channels can carry classical messages (classical bits) so that the receiver, at the output of the quatum channel, can recover those messages with a probability of error strictly equal to zero. In our work, we generalize the Shannon's zero-error capacity of discrete memoryless channels to quantum channels. We have exhibited a necessary and sufficient condition for a quantum channel to have a positive zero-error capacity and have reformulated the problem of finding the quantum zero-error capacity in terms of graph theory. This equivalent definition allowed us to demonstrate some properties of ensembles of quantum states and measurement attaining the quantum error-free capacity. We are currently investigatinting to what extent one can claim that the quantum zero-error capacity problem departs from the classical one. Following that road, we have already exhibited some quantum channels for which the set of quantum states that have to be used to reach the zero-error capacity is non-trival. |
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 www.secoqc.netThe SECOQC project has been a large project that gathered 41 partners, academics, large companies and SMEs from all around Europe, during 4 years and a half. From september 2004 to October 2008, most of my research work has been focused on the integration of quantum key distribution (quantum cryptography) into telecommunication networks and this work was being lead within the FP6 European Integrated Projet Secoqc The purpose of Secoqc was to provide solid foundations: hardware, architecture, protocols as well as standards and certification tools for quantum key distribution (QKD) networks. The success of the project will now allow the deployment of network-wide communication applications on top of a global quantum key distribution networks. This happens to be a important step in network security, since QKD can provide an unprecedent level of security in the secret key distribution layer. The Secoqc projet has culminated by a full-scale demonstration of a metropolitan QKD network, in october 2008, in Vienna, Austria. Within Secoqc, I have been in charge, as a deputy of Michel Riguidel, of the scientific and administrative management of the Network (NET) sub-project (partners : ARC, Thales Communications, UNIL). I have also been appointed member of the Secoqc QKD steering commitee (Chairman: Nicolas Gisin), and editor of the Secoqc White Paper on Quantum Key Distribution and Cryptography. Within NET, I have proposed an original architecture for the QKD network (with the concept of network of secrets) and contributed to the specification of the network protocols that have been implemented on the Secoqc QKD network demonstrator. |
Activity Report
The activity report, related to the research theme "Information et Réseaux Quantiques", for the period 2006-2007, is available here (only in French).Current research projects
PROSPIQ: PROtocoles
quantiquesutilisant des Sources
de Photons unIQues
2006-2009
Funded by the French ANR, PNANO program 2006 
SEQURE: Symmetric Encryption with QUantum key REnewal
2008-2010
Funded by the French ANR, SeSur program 2007
Zero Error Capacity of a Quantum Channel (QZEC)
Continuation of the PhD of Rex Medeiros (2005-2008), sponsored by an Alban grant and by Telecom ParisTech.
Past research projects
SECOQC: Development of a global network for SEcure COmmunications based on Quantum Cryptography
FP6 Integrated Project
Funded by the European Commission/IST/Trust and Security
