报告题目: Toward Fault-Tolerant Quantum Computing with Ytterbium Neutral-Atom Arrays

报告人： 张比晨  耶鲁大学

报告人简介：

张比晨，现为耶鲁大学应用物理系助理教授。他的研究围绕容错量子计算展开，构建可逐个操控单个原子的中性原子阵列实验系统。他希望通过硬件与纠错方案的协同设计，推动中性原子量子计算机从小规模演示走向可靠的大规模容错运行。他于杜克大学获得博士学位，本科毕业于中国科学技术大学。在加入耶鲁大学之前，曾在普林斯顿大学从事博士后研究。

摘要：

Achieving fault tolerance through quantum error correction (QEC) is essential for implementing large-scale quantum algorithms with practical advantage, but the large QEC overhead remains a major challenge in experimental implementations. Two complementary routes to reducing this overhead are to lower physical error rates and to reshape the remaining errors into forms that are easier to correct. My research explores both directions in neutral-atom systems. In this talk, I will introduce a new neutral-atom qubit based on the nuclear spin of a long-lived metastable state in ytterbium-171, enabling high-fidelity single- and two-qubit gates. A key feature of this platform is that a substantial fraction of physical operation errors can be detected mid-circuit and converted into erasure errors. Unlike Pauli-type errors, erasures come with a known location, which makes them far easier for QEC protocols to handle. Building on this capability, I will present our experimental demonstrations of error-correcting codes and logical-qubit operations in an erasure-biased noise regime. Using mid-circuit erasure information, we also demonstrate adaptive circuit execution.

报告时间： 2026年 8月24日 （星期一）9:30（北京时间 ）

报告地点：  腾讯会议：355-9994-7797 无密码  

主办单位： 原子与分子物理研究所