Project 13: Multipartite quantum communication systems

Host Institute: University of Düsseldorf

Project Supervisor: Prof Dr Dagmar Bruß

ESR: Federico Grasselli

Starting date: July 2017

Duration: 3 years

Project Description

The PhD student will investigate quantum communication scenarios with more than two parties. This theory project is structured into the following subtopics: 1) Multipartite quantum key distribution and its security analysis; here, the researcher will analyse the security of quantum cryptography when using multipartite entanglement, with particular emphasis on finite-key effects and device-independent scenarios.  2) Distribution of multipartite entanglement; here, the researcher will carry out a performance analysis for establishing multipartite entanglement (especially, over long distances), via the concept of graph state quantum repeater networks. Particular attention will be given to hardware requirements such as photon sources, memories, gates and detectors. The performance of a network with quantum routers will also be studied. 3) Quantum communication protocols beyond quantum key distribution; here, the  researcher will study other multipartite quantum communication protocols such as secret sharing, and investigate their security in an  implementation, using the results from the previous subtopics.

Project Outcomes

To be updated.