Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 73: Quantum Technologies – Solid State Systems

Q 73.4: Vortrag

Freitag, 6. März 2026, 12:00–12:15, P 7

Detecting Bell-Operator Correlations in Superconducting Devices — Ke Wang¹, Weikang Li², Shibo Xu¹, Mengyao Hu³, Jiachen Chen¹, Yaozu Wu¹, Chuanyu Zhang¹, Feitong Jin¹, Xuhao Zhu¹, Yu Gao¹, Ziqi Tan¹, Zhengyi Cui¹, Aosai Zhang¹, Ning Wang¹, Yiren Zou¹, Tingting Li¹, Fanhao Shen¹, Jiarun Zhong¹, Zehang Bao¹, Zitian Zhu¹, Zixuan Song¹, Jinfeng Deng¹, Hang Dong¹, Xu Zhang¹, Pengfei Zhang¹, Wenjie Jiang¹, Zhide Lu¹, Zheng-Zhi Sun¹, Hekang Li¹, Qiujiang Guo¹, Zhen Wang¹, •Patrick Emonts^3,4, Jordi Tura³, Chao Song¹, Hao Wang¹, and Dong-Ling Deng² — ¹Zhejiang University, China — ²Tsinghua University, China — ³Leiden Univsersity, The Netherlands — ⁴Ulm University, Germany

Quantum nonlocality represents a stronger form of quantum correlation than entanglement and defies Einstein's notion of local realism. It serves as a key resource for applications such as cryptography or certified randomness. Yet, detecting nonlocality in many-body systems remains highly challenging. In this talk, I present the experimental viability of Hamiltonians to certify genuine multipartite Bell-Operator correlations in systems up to 24 qubits on a programmable superconducting processor. As an example, we variationally prepare a low-energy state of a 73-qubit honeycomb model and certify its Bell-Operator correlations by measuring an energy exceeding the classical bound by 48 standard deviations. This establishes a practical route for preparing and certifying multipartite Bell correlations as a stronger benchmark beyond entanglement (Phys. Rev. X 15, 021024, 2025).

Keywords: Superconducting Qubits; Bell Nonlocality; Device Certification; Experiment and Theory