在表面代码值以下的实验量子错误纠正通过全微波泄漏抑制进行了实验
Tan He1,2,3, Weiping Lin1,2,3, Rui Wang1,2,3
1Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China.
Physical review letters
|January 20, 2026
概括
量子错误校正 (QEC) 克服了量子计算中的噪声. 这项研究展示了一种抑制泄漏错误的新架构,在可扩展的量子计算中实现1.40(6) 的逻辑错误抑制系数.
科学领域:
- 量子信息科学 量子信息科学
- 量子计算是一种量子计算.
- 量子错误纠正方法 量子错误纠正方法
背景情况:
- 可扩展的量子计算依赖于量子错误校正 (QEC) 来抑制错误.
- 泄漏错误,即量子信息逃离计算子空间,对QEC可扩展性构成重大挑战.
- 这些泄漏错误会产生长期存在的相关错误,阻碍性能.
研究的目的:
- 通过实施全微波泄漏抑制架构来证明一个在错误值以下运行的量子内存.
- 为了扭转量子系统中完全泄漏错误所造成的高于值的缩放.
- 为了实现更先进的量子错误校正实现.
主要方法:
- 实现一个全微波泄漏抑制架构.
- 使用距离-7表面代码来编码逻辑量子比特.
- 集成一个硬件效率高的数据量子比特的泄漏减少单元和辅助量子比特的快速重置.
主要成果:
- 实现了 Λ=1.40(6) 的逻辑错误抑制系数,证明了低于错误值的操作.
- 成功地逆转了以前由于泄漏错误造成的有害的超值缩放 (Λ<1).
- 在40个循环后,平均泄漏群体被72至6.4(5) ×10^{-4} 的因子抑制.
结论:
- 经过证明的全微波控制架构可用于在规模上抑制关键错误.
- 这种方法为开发更先进的量子错误校正技术铺平了道路.
- 有效的泄漏抑制对于实现容错量子计算至关重要.
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