Description
Date depot: 2 avril 2018
Titre: Contextuality for quantum information networks
Directeur de thèse:
Damian MARKHAM (LIP6)
Domaine scientifique: Sciences et technologies de l'information et de la communication
Thématique CNRS : Non defini
Resumé:
Contextuality
and non-locality are two fundamental features of quantum mechanics which
separate it from all classical theories. In essence they relate to the origin
of randomness inherent in quantum measurement, and say that this cannot be
reduced to ignorance of the physical set up (the origin of randomness in all
classical theories).
In recent years we have understood that these two features have deep
implications for quantum information with many applications including device
independent security (where assumptions about functionality of devices can be
circumnavigated) [1] and communication complexity [2]. Most recently we begin
to understand that contextuality appears to be at the heart of computational
advantage [3].
In this project the student will
explore the role and application of contextuality and non-locality for quantum
networks. They will look at how it can be applied for advantage in
computational and communication tasks, as well as metrological ones. They will
be to build on recent work by our team where we have developed a new family of
contextuality witnesses, and their application for bounding dimension of the
underlying physical system [4].
At the
same time we will explore how proof of principle experiments can be implemented
in quantum optics, in collaboration with experimental teams within the QI team
in LIP6, and close collaborators
Throughout this theoretical study,
the student will also be encouraged to consider and develop proof of principle
experimental tests. In particular the QI team in LIP6 has strong theoretical
and experimental components, and one of the advantages of this position is that
we have good connection to experiments allowing us to demonstrate our ideas in
practice, which will be important for their adoption in future quantum
networks.
Doctorant.e: Hanouz Lucas