soleil

Soutenance de thèse/ Séminaires/ HDR


Soutenance de thèse

Adrien Cavaillès soutiendra sa thèse intitulée « Tests de non-localité et protocoles de communication quantique utilisant l’intrication hybride optique », le jeudi 14 février à 14h à Jussieu, amphi Herpin au rez-de-chaussée du bâtiment Esclangon (voir plan d’accès ci-joint).

La thèse était réalisée sous la direction de Julien Laurat au sein de l’équipe d’optique quantique.

Elle se déroulera en anglais.

Abstract: During this defence, I will report on several quantum communication protocols using a novel hybrid approach where discrete-variable (DV) systems are used jointly with continuous-variable (CV) resources.

It will be centered on the experimental realization of hybrid entanglement of light between Schrödinger-kitten and photon-number states, generated using optical parametric oscillators. This entangled state is characterized using homodyne detection systems and used in an asymmetric non-locality test of Einstein-Podolsky-Rosen steering. The experimentally observed violation of a steering inequality opens the possibility of using hybrid states in “one-sided device independent protocols”, proven secure even when some of the involved parties are untrusted.

Finally, I will report on the current advances made towards the realization of hybrid quantum teleportation where information encoded in a DV basis is teleported on a CV state. The success of such a protocol, analogous to a digital-to-analogue converter, would allow the implementation of protocols where CV and DV resources are used in sequence to draw from each encoding’s respective benefits.

Séminaire

SEMINAR:  Pas de séminaire à annoncer en ce moment.