Journal
NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-32495-7
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Funding
- InnoFond Denmark through the Eureka Turbo program
- European Research Council (ERC) under the EU [787520]
- VILLUM FONDEN [25880]
- CAPES
- CNPQ
- European Research Council (ERC) [787520] Funding Source: European Research Council (ERC)
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This study reports a high-purity EPR state between two light modes, demonstrating strong quantum correlations and an extended frequency range, which enables new matter-light quantum protocols.
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.
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