Tiny Light Rings Enable Massive Quantum Leap

The microresonator supports multiple spectral qumodes, several of which are simultaneously pumped using equally spaced continuous-wave lasers. Quantum microcombs with varying entanglement structures are generated through two-mode squeezing (TMS), enabled by either degenerate or non-degenerate four-wave mixing (FWM) processes.

Scientists have created the largest quantum entanglement network ever built on a single chip, potentially unlocking new possibilities for ultra-secure communications and next-generation computing. The breakthrough, achieved by researchers from Peking University and the Chinese Academy of Sciences, connects 60 distinct light modes in a coordinated quantum dance within a device smaller than a fingernail. … Read more