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  • Letter
  • Open Access

Continuous-wave all-optical single-photon transistor based on a Rydberg-atom ensemble

Iason Tsiamis1,2,*, Oleksandr Kyriienko3, and Anders S. Sørensen4

  • *Contact author: iason.tsiamis@fu-berlin.de
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Phys. Rev. A 113, L011701 – Published 5 January, 2026

DOI: https://doi.org/10.1103/7q3h-nvm6

Abstract

Continuous-wave (cw) architectures provide a promising route to interface disparate quantum systems by relaxing the need for precise synchronization. While essential cw components, including microwave single-photon transistors and microwave–optical converters, have been explored, an all-optical cw single-photon transistor has remained a missing piece. We propose a high-efficiency, high-gain implementation using Rydberg atoms, in which a control photon disrupts the transmission of a continuous probe beam via the van der Waals interaction. This device completes the set of components required for cw processing of quantum signals and paves the way for all-optical processing at the quantum level.

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Continuous-wave quantum light control via engineered Rydberg-induced dephasing

Iason Tsiamis, Oleksandr Kyriienko, and Anders S. Sørensen
Phys. Rev. A 113, 013710 (2026)

Article Text

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Phys. Rev. A 113, L011701– Published 5 January, 2026
  • Received 5 August 2025
  • Revised 30 September 2025
  • Accepted 28 October 2025
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