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¡¶º«¹úÓ°Ï·¡¶Ð¡½ã¡·Ï¸Ë¼¼«¿ÖµÄϸ½Ú - С½ã - ¶¹°ê¡·ÊÓÆµËµÃ÷£ºÀîÈ»ÐÄÖÐûÓÐһ˿һºÁµÄÇáÊÓËûÊÖÖеĹƶ¼ÓÐЩÀÃÆ·Öʲ¢²»ËãÓÅÁ¼ÔÚ¼ÓÉÏҪαװ×Ô¼º²»¿ÉƴɱµÃÌ«Ð׺ÝÒò´Ë´ËÕ½ÊÇʤÊǰܻ¹ÔÚÁ½¿ÉÖ®¼äÖÕÓÚÓÐÒ»ÌìÕÅÖ¾·¼ÐËÆðÓÂÆøÏòÕÂÅåºèÅú×¢ÎúHere we demonstrate a new neutral atom qubit using the nuclear spin of a long-lived metastable state in 171Yb. The long coherence time and fast excitation to the Rydberg state allow one- and two-qubit gates with fidelities of 0.9990(1) and 0.980(1), respectively. Importantly, a large fraction of all gate errors result in decays out of the qubit subspace to the ground state. By performing fast, mid-circuit detection of these errors, we convert them into erasure errors; during detection, the induced error probability on qubits remaining in the computational space is less than 10?5. This work establishes metastable 171Yb as a promising platform for realizing fault-tolerant quantum computing.
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2025-09-21 20:46:00