SAMOP 2021 – scientific programme

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QI: Fachverband Quanteninformation

QI 11: Quantum Communication

QI 11.2: Invited Talk

Thursday, September 23, 2021, 14:30–15:00, H4

Photonic graph states for quantum communication and quantum computing — •Stefanie Barz — Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Germany — Centre for Integrated Quantum Science and Technologies, University of Stuttgart, Germany

Multipartite entanglement and, in particular, graph states are useful resources both for quantum computing and quantum communication, especially in networked settings. In this talk, I will show a few examples where multipartite entanglement offers an advantage over classical or bipartite approaches. In particular, I will present how photonic graph states can serve as a resource for computation and, vice versa, how computation can be used as a tool to test certain states. Furthermore, I will show how graph states offer an advantage for communication protocols, in particular in networked settings and where one aims at keeping the identity of the communicating parties private. I will present implementations of these concepts and discuss challenges in scaling up photonic quantum technologies.