A generalized multipath delayed-choice experiment on a large-scale quantum nanophotonic chip

Xiaojiong Chen, Yaohao Deng, Shuheng Liu, Tanumoy Pramanik, Jun Mao, Jueming Bao, Chonghao Zhai, Tianxiang Dai, Huihong Yuan, Jiajie Guo, Shao-Ming Fei, Marcus Huber, Bo Tang, Yan Yang (), Zhihua Li, Qiongyi He (), Qihuang Gong () and Jianwei Wang ()
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Xiaojiong Chen: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Yaohao Deng: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Shuheng Liu: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Tanumoy Pramanik: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Jun Mao: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Jueming Bao: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Chonghao Zhai: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Tianxiang Dai: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Huihong Yuan: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Jiajie Guo: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Shao-Ming Fei: School of Mathematical Sciences, Capital Normal University
Marcus Huber: Institute for Quantum Optics and Quantum Information – IQOQI Vienna, Austrian Academy of Sciences
Bo Tang: Institute of Microelectronics, Chinese Academy of Sciences
Yan Yang: Institute of Microelectronics, Chinese Academy of Sciences
Zhihua Li: Institute of Microelectronics, Chinese Academy of Sciences
Qiongyi He: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Qihuang Gong: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University
Jianwei Wang: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Bohr’s complementarity is one central tenet of quantum physics. The paradoxical wave-particle duality of quantum matters and photons has been tested in Young’s double-slit (double-path) interferometers. The object exclusively exhibits wave and particle nature, depending measurement apparatus that can be delayed chosen to rule out too-naive interpretations of quantum complementarity. All experiments to date have been implemented in the double-path framework, while it is of fundamental interest to study complementarity in multipath interferometric systems. Here, we demonstrate generalized multipath wave-particle duality in a quantum delayed-choice experiment, implemented by large-scale silicon-integrated multipath interferometers. Single-photon displays sophisticated transitions between wave and particle characters, determined by the choice of quantum-controlled generalized Hadamard operations. We characterise particle-nature by multimode which-path information and wave-nature by multipath coherence of interference, and demonstrate the generalisation of Bohr’s multipath duality relation. Our work provides deep insights into multidimensional quantum physics and benchmarks controllability of integrated photonic quantum technology.

Date: 2021
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DOI: 10.1038/s41467-021-22887-6

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