Global Breakthrough in China’s Chip Industry: A Revolutionary Step Forward in Quantum Computing
Researchers at Peking University have achieved a groundbreaking milestone in the field of chip technology, successfully demonstrating the world’s first "continuous-variable" quantum entangled cluster state based on integrated optical quantum chips. This breakthrough lays a critical foundation for the large-scale expansion of optical quantum chips and their applications in quantum computing, quantum networks, and quantum information. The related research was published in the prestigious international journal *Nature* under the title “Continuous-Variable Many-Body Quantum Entanglement Based on Integrated Optical Quantum Frequency Comb Chips.”
After years of research and development, the team has made the first-ever international achievement in the deterministic preparation, reconfigurable control, and rigorous experimental validation of continuous-variable entangled cluster states using integrated optical quantum chips. Quantum bits (qubits) can be realized on optical quantum chips through both discrete variable encoding and continuous variable encoding methods. Traditionally, discrete variable encoding, which uses single photons, has been employed to achieve qubits with ultra-high fidelity. However, as the number of qubits increases, the success rate of this method declines exponentially.
To address this, the team innovated by using a continuous-variable encoding method based on optical fields. This breakthrough solved the issue of the "trade-off" between quantum bit preparation and quantum entanglement generation, enabling the first-ever deterministic generation of quantum entangled cluster states on a chip.
This pioneering achievement offers a new technological path for the preparation and manipulation of large-scale quantum entanglement states. It holds significant potential to accelerate the practical development of quantum computing, quantum networks, and quantum simulations.
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