我科学家实现超快高保真度中性原子态探测

Core Insights - The research team led by Professor Guo Guangcan from the University of Science and Technology of China has made significant advancements in the field of neutral atom quantum information, achieving record-breaking speed and fidelity in atomic state readout [1][2] Group 1: Research Achievements - The team utilized a fiber microcavity coupled with neutral atoms in the Purcell region to achieve ultra-fast, high-fidelity atomic state readout, setting a new record for both speed and fidelity in publicly reported results [1] - The system demonstrated a cooperative factor of 4.7, enhancing the spontaneous emission rate of atoms by approximately 10 times, indicating its potential as a high-performance neutral atom-photon quantum interface and quantum network node [1] Group 2: Technical Innovations - By employing strong resonant driving of closed-loop transitions and a low momentum transfer excitation strategy, the team increased the detection count rate of photons to 18M/s, achieving a fidelity of 99.1% within a 200-nanosecond time window and 99.985% within a 9-microsecond window, both setting new public records [2] - The probability of losing atoms during the readout process remained below 3‰, showcasing the non-destructive detection feature compatible with quantum error correction protocols [2] Group 3: Implications for Quantum Computing - This breakthrough in ultra-fast, high-fidelity atomic state readout is crucial for reducing time and physical resource consumption in quantum computing and for enabling long-range scalable quantum networks [2]