Quantum 2025 – wissenschaftliches Programm
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MON: Monday Contributed Sessions
MON 9: Quantum Entanglement
MON 9.8: Vortrag
Montag, 8. September 2025, 16:00–16:15, ZHG101
Strong quantum nonlocality in multipartite system — •Mengying Hu1,2, Ting Gao1, and Fengli Yan3 — 1School of Mathematical Sciences, Hebei Normal University, Shijiazhuang 050024, China — 2University of Siegen, Siegen, Germany — 3College of Physics, Hebei Normal University, Shijiazhuang 050024, China
Strong quantum nonlocality is a stronger form of nonlocality than that manifested by locally indistinguishable quantum states. It has efficient applications in quantum information hiding and quantum secret sharing. We construct strongly nonlocal orthogonal genuinely entangled sets and strongly nonlocal orthogonal genuinely entangled bases in an N -qutrit system, which provide an answer to the open problem in Ref. [Phys. Rev. Lett. 122, 040403 (2019)]. The strongly nonlocal orthogonal genuinely entangled set we constructed in N-qutrit systems contains much fewer quantum states than previous one. When N > 3, our result answers the open question in Ref. [Phys. Rev. A 104, 012424 (2021)]. A sufficient and necessary condition for the strongest nonlocality in general N-partite systems is presented. We successfully construct the strongest nonlocal genuinely entangled sets in (Cd)⊗ N for d ≥ 4, which have a smaller size than the existing sets as N increases.
Keywords: Multiparticle entanglement; Nonlocality