Room-temperature single-photon source with near-millisecond built-in memory
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- s41467-021-24033-8
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Non-classical photon sources are a crucial resource for distributed quantum networks. Photons generated from matter systems with memory capability are particularly promising, as they can be integrated into a network where each source is used on-demand. Among all kinds of solid state and atomic quantum memories, room-temperature atomic vapours are especially attractive due to their robustness and potential scalability. To-date room-temperature photon sources have been limited either in their memory time or the purity of the photonic state. Here we demonstrate a single-photon source based on room-temperature memory. Following heralded loading of the memory, a single photon is retrieved from it after a variable storage time. The single-photon character of the retrieved field is validated by the strong suppression of the two-photon component with antibunching as low as g(RR|W=1)((2)) = 0:20 +/- 0:07. Non-classical correlations between the heralding and the retrieved photons are maintained for up to tau(R)(NC) = (0:68 +/- 0:08) ms, more than two orders of magnitude longer than previously demonstrated with other room-temperature systems. Correlations sufficient for violating Bell inequalities exist for up to tau(BI) = (0.15 +/- 0.03) ms.
Originalsprog | Engelsk |
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Artikelnummer | 3699 |
Tidsskrift | Nature Communications |
Vol/bind | 12 |
Udgave nummer | 1 |
Antal sider | 7 |
ISSN | 2041-1723 |
DOI | |
Status | Udgivet - 17 jun. 2021 |
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