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Manipulating directional flow in a two-dimensional photonic quantum walk under a synthetic magnetic field

Author

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  • Quan Lin

    (Beijing Computational Science Research Center)

  • Wei Yi

    (University of Science and Technology of China
    CAS Center For Excellence in Quantum Information and Quantum Physics)

  • Peng Xue

    (Beijing Computational Science Research Center)

Abstract

Matter transport is a fundamental process in nature. Understanding and manipulating flow in a synthetic media often have rich implications for modern device design. Here we experimentally demonstrate directional transport of photons in a two-dimensional quantum walk, where the light propagation is highly tunable through dissipation and synthetic magnetic flux. The directional flow hereof underlies the emergence of the non-Hermitian skin effect, with its orientation continuously adjustable through the photon-loss parameters. By contrast, the synthetic magnetic flux originates from an engineered geometric phase, which, by inducing localized cyclotron orbits, suppresses the bulk flow through magnetic confinement. We further demonstrate how the directional flow and synthetic flux impact the dynamics of the Floquet topological edge modes along an engineered boundary. Our results exemplify an intriguing strategy for engineering directed light transport, highlighting the interplay of non-Hermiticity and gauge fields in synthetic systems of higher dimensions.

Suggested Citation

  • Quan Lin & Wei Yi & Peng Xue, 2023. "Manipulating directional flow in a two-dimensional photonic quantum walk under a synthetic magnetic field," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42045-4
    DOI: 10.1038/s41467-023-42045-4
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    References listed on IDEAS

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    1. Deyuan Zou & Tian Chen & Wenjing He & Jiacheng Bao & Ching Hua Lee & Houjun Sun & Xiangdong Zhang, 2021. "Observation of hybrid higher-order skin-topological effect in non-Hermitian topolectrical circuits," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    2. Kai Zhang & Zhesen Yang & Chen Fang, 2022. "Universal non-Hermitian skin effect in two and higher dimensions," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Quan Lin & Tianyu Li & Lei Xiao & Kunkun Wang & Wei Yi & Peng Xue, 2022. "Observation of non-Hermitian topological Anderson insulator in quantum dynamics," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    4. Sebastian Weidemann & Mark Kremer & Stefano Longhi & Alexander Szameit, 2022. "Topological triple phase transition in non-Hermitian Floquet quasicrystals," Nature, Nature, vol. 601(7893), pages 354-359, January.
    5. Linhu Li & Ching Hua Lee & Sen Mu & Jiangbin Gong, 2020. "Critical non-Hermitian skin effect," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    6. Xiujuan Zhang & Yuan Tian & Jian-Hua Jiang & Ming-Hui Lu & Yan-Feng Chen, 2021. "Observation of higher-order non-Hermitian skin effect," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
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