SAMOP 2021 – scientific programme

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QI: Fachverband Quanteninformation

QI 8: Quantum Information: Poster (joint session QI/Q)

QI 8.7: Poster

Wednesday, September 22, 2021, 16:30–18:30, P

Detecting Genuine Multipartite Entanglement Using Quantum Teleportation — •Sophie Egelhaaf, Harry Giles, and Paul Skrzypczyk — University of Bristol, Bristol, UK

In the standard quantum teleportation protocol one party is given an unknown quantum state that is teleported to another party, using a shared entangled state, a Bell state measurement and classical communication. In this work, we consider adding a third party, whose role is to act as a ‘gatekeeper’, either allowing or blocking the teleportation between the other two parties.

We show that the capabilities of the gatekeeper depend upon the type of multipartite entanglement they share with the other two parties. In particular, we show that a sufficiently ideal performance can only be achieved if the shared state is genuine multipartite entangled.