Work

Two-colour high-purity Einstein-Podolsky-Rosen photonic state

Year: 2022

Type: article

Abstract: 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 [Formula: see text]. 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.

Source: Nature Communications

DOI: 10.1038/s41467-022-32495-7

Authors: Tulio Brito Brasil, Valeriy Novikov, Hugo Kerdoncuff, Mikael Lassen, Eugene S. Polzik

Institutions: University of Copenhagen, Russian Quantum Center, Danish National Metrology Institute

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $5,890