在超过蒸门的IBM量子处理器上注入魔力状态.
Younghun Kim1,2, Martin Sevior3, Muhammad Usman3,4
1School of Physics, The University of Melbourne, Parkville, 3010, VIC, Australia. younghunk@student.unimelb.edu.au.
Scientific reports
|February 26, 2026
概括
这项研究展示了使用IBM量子处理器上的表面代码进行故障耐受量子计算的高保真度魔力状态准备. 这推动了对通用量子计算机必不可少的非克利福德逻辑门的实现.
科学领域:
- 量子计算是一种量子计算.
- 容错量子计算的量子计算方法
- 量子错误的纠正 量子错误的纠正
背景情况:
- 表面代码是对容错量子计算的领先方法.
- 万能容错需要非克利福德操作和魔力状态,这给实验带来了挑战.
- 很难有效地将表面代码嵌入到具有连接限制的硬件上.
研究的目的:
- 解决实施非克利福德门和嵌入表面代码的挑战.
- 在IBM量子处理器上演示高保真魔幻状态准备.
- 改进表面代码的错误值.
主要方法:
- 使用了一种量子比特效率高的 IBM 量子处理器 (ibm_fez) 的旋转重六角表面代码.
- 在非Clifford操作中实施了魔法状态注入协议.
- 采用后选择来准备逻辑魔法状态.
主要成果:
- 与传统嵌入相比,实现了逻辑位翻转 ([公式:见文本]) 和阶段翻转 ([公式:见文本]) 错误的更高错误值.
- 准备的逻辑魔力状态 ([公式:见文本]和[公式:见文本]) 的忠实度 ([公式:见文本]和[公式:见文本]) 超过魔力状态蒸值.
- 报告了注入任意单个逻辑量子位状态的[公式:参见文本]的最低忠实度.
结论:
- 通过高保真魔力状态准备,证明了实现非克利福德逻辑门的潜力.
- 开发的方法显示了在当前量子硬件上推进容错量子计算的前景.
- 这些发现有助于克服构建通用量子计算机的关键障碍.
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