Researchers in China have achieved a major leap in quantum photonics by generating a massive 60-mode entangled cluster state directly on a chip using optical microresonators.
By leveraging a deterministic, continuous-variable approach and a multiple-laser pump technique, they overcame traditional limitations in scalability. The team confirmed high-quality entanglement using advanced detection methods, paving the way for powerful quantum technologies like chip-based computers, secure communications, and cutting-edge sensors.
A research team from Peking University and the Chinese Academy of Sciences has achieved a major advance in quantum photonics by generating large-scale entangled states—known as cluster states—directly on a chip. Using optical microresonators, they produced a 60-mode cluster state, which is about ten times larger than what had been previously achieved with on-chip systems. Their findings were published in Light: Science & Applications.
Cluster states are crucial for many quantum technologies because they allow multiple quantum systems to interact in a coordinated, entangled way. This kind of entanglement underpins powerful applications in quantum computing, ultra-secure communications, and precision sensing. Until now, creating large cluster states on a chip was challenging, as most methods relied on probabilistic processes that limited scalability. The researchers overcame this by using a continuous-variable approach that generates entanglement deterministically—meaning reliably and on demand.
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