Direction switchable single-photon emitter using a Rydberg polariton

• URL: http://arxiv.org/abs/2504.02503v1
• Date: Thu, 03 Apr 2025 11:35:36 GMT
• Title: Direction switchable single-photon emitter using a Rydberg polariton
• Authors: Changcheng Li, Xiao-Feng Shi, Yuechun Jiao, Jiuheng Yang, Jingxu Bai, C. Stuart Adams, Suotang Jia, Jianming Zhao,
• Abstract summary: We show a direction switchable single-photon emitter using a Rydberg polariton.<n>We propose a quantum routing of single photons with textitN output channels and unity routing efficiency.
• Score: 1.8894050583899684
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: All-optical redirection or routing of single photons is essential for quantum networks. Although studied in various systems both in theory and experiment, the redirection of single photons with many output ports, compatible with large-scale photonic circuits, still needs to be explored. Here, we demonstrate a direction switchable single-photon emitter using a Rydberg polariton. The Rydberg component of the stored photon is changed using a stimulated Raman transition with a specific intermediate state. By adjusting the direction of the retrieval laser, we can redirect the emitted photon into a rich variety of alternative modes. Building upon this scheme, we propose a quantum routing of single photons with \textit{N} output channels and unity routing efficiency. In addition, the protocol reduces the effect of motional dephasing increasing the photon lifetime to $>10~\mu$s ($>20$ times photon processing time), enabling functional quantum devices based on Rydberg polaritons.

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