Two-colour high-purity Einstein-Podolsky-Rosen photonic state
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We report a high-purity Einstein-Podolsky-Rosen (EPR) state between light modes with the wavelengths separated by more than 200 nm. We demonstrate highly efficient EPR-steering between the modes with the product of conditional variances epsilon(2) = 0.11 +/- 0.01 << 1. The modes display - 7.7 +/- 0.5 dB of two-mode squeezing and an overall state purity of 0.63 +/- 0.16. EPR-steering is observed over five octaves of sideband frequencies from RF down to audio-band. The demonstrated combination of high state purity, strong quantum correlations, and extended frequency range enables new matter-light quantum protocols.
Originalsprog | Engelsk |
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Artikelnummer | 4815 |
Tidsskrift | Nature Communications |
Vol/bind | 13 |
Udgave nummer | 1 |
Antal sider | 5 |
ISSN | 2041-1723 |
DOI | |
Status | Udgivet - 16 aug. 2022 |
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