Description
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