Projet de recherche doctoral numero :5281


Date depot: 10 août 2018
Titre: Photonic resources for quantum network protocol implementation
Directrice de thèse: Eleni DIAMANTI (LIP6)
Domaine scientifique: Sciences et technologies de l'information et de la communication
Thématique CNRS : Non defini

Resumé: The general context of this thesis project is the vision of the emerging quantum communication networks. The goal of such networks is to provide fundamentally new technology by enabling quantum communication between distant parties, eventually leading to a Quantum Internet. Such networks allow the transmission of quantum bits (qubits) over long distances in order to solve tasks that are provably impossible for any classical communication network. Possibly the most well-known protocol is quantum key distribution, which enables secure communication; but, quantum communication is also known to offer significant advantages for many other tasks. Moreover, the ability to generate entanglement between distant sites provides scientists with a unique new platform for fundamental studies of nature. Photonic resources will be at the heart of the quantum network infrastructure as they provide the optimal means for communication between the network nodes.  In this thesis project, we propose to develop a photonic experimental platform tailored to the implementation of quantum communication protocols, with the goal of demonstrating a quantum advantage in security and communication efficiency in a network environment. The resources we will develop include multiparty entangled photon generation and distribution, as well as photonic circuits exploiting the manipulation of trains of coherent light pulses. These will be used for implementations of tasks such as anonymous quantum transmission, authenticated quantum teleportation, and quantum communication complexity, which are prominent cases of useful protocols where a quantum advantage can be rigorously shown. To address the stringent constraints imposed by the theoretical analysis of these protocols to show such an advantage, the experiments performed in the thesis will test new techniques for improving the efficiency and the quality of the generated quantum states and of the detection process. They will aim at surpassing the state of the art with respect to several benchmarks. We expect that the outcome of this thesis will provide photonic devices and systems readily useful as building blocks in quantum networks with a demonstrated operation and successful performance for well-defined tasks in this context.

Doctorant.e: Neves Simon