超导量子处理器上的颜色代码中的缩放和逻辑
N Lacroix1,2, A Bourassa3, F J H Heras4
1Google Research, Mountain View, CA, USA. nathan.lacroix@phys.ethz.ch.
Nature
|May 26, 2025
概括
使用超导处理器上的颜色代码进行量子错误校正是有希望的. 这项研究证明了更好的逻辑错误抑制和高保真性操作,为容错的量子计算铺平了道路.
科学领域:
- 量子信息科学
- 量子计算硬件
背景情况:
- 量子错误校正对于容错量子计算至关重要.
- 超导处理器是量子计算的领先平台.
- 表面代码对逻辑运算有局限性,
研究的目的:
- 在超导处理器上展示颜色代码的可行性和性能.
- 随着代码距离的增加,研究颜色代码的缩放特性.
- 评估颜色代码对高效逻辑运算和通用量子计算的潜力.
主要方法:
- 在超导处理器上实现颜色代码.
- 通过将代码距离从3增加到5来扩展实验.
- 逻辑随机基准测试横向的克利福德门.
- 魔法状态注入用于通用计算.
- 为了传输逻辑状态而进行格子手术.
主要成果:
- 在将代码距离从3缩小到5时,逻辑错误被抑制了1.56.
- 模拟性能表明颜色代码低于其错误值.
- 实现了超过99%的逻辑状态忠实性, 克利福德门和魔法状态注入.
- 在颜色代码之间成功传输逻辑状态.
结论:
- 颜色代码是超导处理器量子错误校正的可行和有前途的方法.
- 颜色代码显示了有利的缩放和超越表面代码的潜力.
- 这项工作为未来使用颜色代码进行容错量子计算的研究提供了坚实的基础.
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