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QI: Fachverband Quanteninformation

QI 4: Poster: Quantum Information

QI 4.20: Poster

Montag, 5. September 2022, 18:00–20:00, P2

Multipartite High-dimensional Quantum Steering — •Sophie Egelhaaf and Roope Uola — Department of Applied Physics, University of Geneva, 1211 Geneva, Switzerland

Bipartite low dimensional entanglement has been studied extensively. However, many findings cannot be extrapolated to multiple parties and moreover, increasing the dimensions of the systems adds complexity to the entanglement structure.

We are interested in characterising the degree of high-dimensional entanglement, specifically focusing on various multipartite quantum steering scenarios. One such example is a triangle network with only one trusted party, or more generally a line network with some trusted parties. We investigate what can be deduced about the strength of entanglement between the different nodes of the network in such scenarios. We are especially interested in entanglement dimensionality, i.e. the question of how many degrees of freedom can be certified to be entangled, for which we provide analytical bounds.