Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
QI: Fachverband Quanteninformation
QI 20: Quantum Networks (joint session QI/Q)
QI 20.5: Vortrag
Mittwoch, 12. März 2025, 15:45–16:00, HS VIII
Graph states fidelity bound in networks with local operation and shared randomness — •Justus Neumann1, Tulja Varun Kondra1, Nikolai Wyderka1, Kiara Hansenne2, Lisa Weinbrenner2, Hermann Kampermann1, Otfried Gühne2, and Dagmar Bruß1 — 1Heinrich-Heine-Uinversität Düsseldorf — 2Universität Siegen
We analyze quantum networks of spatially separated parties, where some parties are connected by quantum channels (links), enabling the distribution of pairwise entangled states. Additionally, each party has access to a shared classical random variable. Quantum states generated under these conditions are referred to as LOSR states (Local Operations and Shared Randomness). Characterizing this class of network states is often challenging, as determining whether a given state can be realized within a given network configuration is non-trivial. We derive an analytical upper bound on the fidelity of the set of LOSR states with any connected graph state, with particular emphasis on the GHZ state.
Keywords: multipartite entanglement