Non-Hermitian unidirectional routing of photonic qubits

En-Ze Li; Yi-Yang Liu; Ming-Xin Dong; Dong-Sheng Ding; Bao-Sen Shi

doi:10.1117/12.2687469

26 November 2023 Non-Hermitian unidirectional routing of photonic qubits

En-Ze Li, Yi-Yang Liu, Ming-Xin Dong, Dong-Sheng Ding, Bao-Sen Shi

Proceedings Volume 12775, Quantum and Nonlinear Optics X; 127751H (2023) https://doi.org/10.1117/12.2687469
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

The efficient unidirectional routing of photonic qubits is significant in the fields of both classical and quantum information processing. However, the photonic qubit router is still elusive due to the simultaneous requirements for high fidelity, precise directionality, and high isolation ratio. Here, we introduce a method to achieve non-Hermitian unidirectional routing of photonic qubits. Our method leverages tunable incoherent dissipative channels connecting traveling photonic qubits with localized atomic systems. Through dynamic control of both coherent and incoherent channels via manipulation of the control field’s helicity, we clarify the transition from nondirectional to unidirectional routing. The experimental results showcase the qubit fidelity exceeding 97.49% and the isolation ratio surpassing 14dB. This method not only enables the establishment of extensive quantum networks but also serves as a pivotal component in chiral topological photonics, chiral networks, and unidirectional quantum information transfer.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

En-Ze Li, Yi-Yang Liu, Ming-Xin Dong, Dong-Sheng Ding, and Bao-Sen Shi "Non-Hermitian unidirectional routing of photonic qubits", Proc. SPIE 12775, Quantum and Nonlinear Optics X, 127751H (26 November 2023); https://doi.org/10.1117/12.2687469

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