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Open Quantum Systems Decoherence Photonic Quantum Computing

Single-Photon-Level Atomic Frequency Comb Storage in Room Temperature Alkali Vapour

arXiv

Authors: Zakary Schofield, Vanderli Laurindo, Ori Ezrah Mor, Patrick M. Ledingham

Year

2025

Paper ID

17817

Status

Preprint

Abstract Read

~2 min

Abstract Words

120

Citations

N/A

Abstract

We have demonstrated the coherent storage and retrieval of single-photon-level light using the atomic frequency comb protocol in a room temperature rubidium vapour. Velocity-selective optical pumping is used to prepare the comb within the F=2 hyperfine ground state of rubidium, with the spacing between peaks coinciding with half the F = 2 - F =3 hyperfine splitting of the 5²P_3/2 excited state. Weak coherent states of average photon number μ_in = 0.083(5) are stored with pre-programmed recall time of 7.5 ns with an efficiency of η_{textrm{AFC}} = 6.59(5) \%, while two temporally distinct modes have been stored and recalled with η_{textrm{AFC}} = 2.6(1) \%, allowing for time-bin qubit storage. Finally, the efficiency is observed to be independent of the input pulse polarisation, paving the way for polarisation qubit storage.

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This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
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We have demonstrated the coherent storage and retrieval of single-photon-level light using the atomic frequency comb protocol in a room temperature rubidium vapour.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2510.26870 [2] arXiv https://arxiv.org/abs/2510.26870 [3] Publisher https://arxiv.org/abs/2510.26870

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