Brasil Tulio Brito, Novikov Valeriy, Kerdoncuff Hugo, Lassen Mikael, Polzik Eugene S
Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
Russian Quantum Center, Skolkovo, Moscow, Russia.
Nat Commun. 2022 Aug 16;13(1):4815. doi: 10.1038/s41467-022-32495-7.
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.
我们报道了在波长相差超过200纳米的光模式之间的高纯度爱因斯坦-波多尔斯基-罗森（EPR）态。我们展示了在具有条件方差乘积[公式：见正文]的模式之间的高效EPR引导。这些模式显示出-7.7±0.5分贝的双模压缩以及0.63±0.16的整体态纯度。从射频到音频频段的五个边带频率倍频程上均观察到了EPR引导。所展示的高态纯度、强量子关联和扩展频率范围的组合实现了新的物质-光量子协议。
