A single-photon-compatible telecom-C-band quantum memory in a hot atomic gas
A single-photon-compatible telecom-C-band quantum memory in a hot atomic gas
The efficient storage and on-demand retrieval of quantum optical states that are compatible with the telecommunications C-band is a requirement for future terrestrial-based quantum optical networking. Spectrum in the C-band minimises optical fiber-propagation losses, and broad optical bandwidth facilitates high-speed networking protocols. Here we report on a telecommunication wavelength and bandwidth compatible quantum memory. Using the Off-Resonant Cascaded Absorption protocol in hot $^{87}$Rb vapour, we demonstrate a total memory efficiency of $20.90(1)\,\%$ with a Doppler-limited storage time of $1.10(2)\,$ns. We characterise the memory performance with weak coherent states, demonstrating signal-to-noise ratios greater than unity for mean photon number inputs above $4.5(6)\times10^{-6}$ per pulse.
quant-ph, physics.atom-ph
Thomas, S.E.
46d610de-ea50-4693-9d4e-1c698f1cf849
Sagona-Stophel, S.
29926919-b513-444d-ae6c-209ca069f469
Schofield, Z.
8538abe1-5ff8-4d73-8650-bc2ccadf8e88
Walmsley, I.A.
a9b02ef9-f5d9-473f-ac01-bbbe06d28170
Ledingham, P.M.
8db45fde-00d8-421a-93d6-7f18ac835c28
8 November 2022
Thomas, S.E.
46d610de-ea50-4693-9d4e-1c698f1cf849
Sagona-Stophel, S.
29926919-b513-444d-ae6c-209ca069f469
Schofield, Z.
8538abe1-5ff8-4d73-8650-bc2ccadf8e88
Walmsley, I.A.
a9b02ef9-f5d9-473f-ac01-bbbe06d28170
Ledingham, P.M.
8db45fde-00d8-421a-93d6-7f18ac835c28
[Unknown type: UNSPECIFIED]
Abstract
The efficient storage and on-demand retrieval of quantum optical states that are compatible with the telecommunications C-band is a requirement for future terrestrial-based quantum optical networking. Spectrum in the C-band minimises optical fiber-propagation losses, and broad optical bandwidth facilitates high-speed networking protocols. Here we report on a telecommunication wavelength and bandwidth compatible quantum memory. Using the Off-Resonant Cascaded Absorption protocol in hot $^{87}$Rb vapour, we demonstrate a total memory efficiency of $20.90(1)\,\%$ with a Doppler-limited storage time of $1.10(2)\,$ns. We characterise the memory performance with weak coherent states, demonstrating signal-to-noise ratios greater than unity for mean photon number inputs above $4.5(6)\times10^{-6}$ per pulse.
Text
2211.04415v1
- Author's Original
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Published date: 8 November 2022
Keywords:
quant-ph, physics.atom-ph
Identifiers
Local EPrints ID: 472507
URI: http://eprints.soton.ac.uk/id/eprint/472507
PURE UUID: 9df9b32f-c3ea-47b8-9a2c-408490a58988
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Date deposited: 07 Dec 2022 17:41
Last modified: 17 Mar 2024 04:03
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Contributors
Author:
S.E. Thomas
Author:
S. Sagona-Stophel
Author:
I.A. Walmsley
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