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Titre : Photonic Resources for Quantum Communications and Cryptography
Date : 2 décembre 2022
Heure: 14:00
Résumé : Quantum networks have raised particular interest in the past decades, as a way of implementing new routines which are unaccessible to classical communications, or showing so-called quantum advantage in problems that are tackled by classical protocols. Through this thesis we developped a source of photons which can be used in order to perform such primitives, which are milestones to a worldwide, practical and secure quantum network. Such source generates entangled-pairs of polarization-encoded qubits, that we could characterize and use in order to perform protocols such as cheat-sensitive coin-flipping between two remote players, and device-independent certified transmission of a qubit through an untrusted and lossy quantum channel. In addition, we started developping a brand-new source of multipartite entangled states, in which the entanglement is distributed over more than two players. This source may later be used in order to perform more complex protocols.
Lieu : Amphithéâtre Charpak