Two-color high-purity entanglement
Valeriy A. Novikov, Túlio Brito Brasil, Hugo Kerdoncuff, Mikael Lassen, Eugene Simon Polzik · Conference on Lasers and Electro-Optics · 2022
We report continuous variable entanglement between light modes of different colors (852nm and 1064nm). Entanglement is demonstrated from radio-frequency down to the acoustic frequency range. The high-purity state violates the separability limit by -7.5 dB.