在超导量子处理器上以超出蒸值的忠实度准备逻辑魔法状态
Yangsen Ye1,2, Tan He1,2, He-Liang Huang1,2,3
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
|December 10, 2023
概括
研究人员开发了一种硬件效率高的协议,用于准备魔法状态,这对于使用表面代码的容错量子计算至关重要. 这一进步使得超导处理器上的高保真逻辑状态准备成为可能.
科学领域:
- 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
- 固态物理 固态物理
背景情况:
- 容错量子计算依赖于错误纠正代码,例如对抗噪声的表面代码.
- 量子计算的普遍性需要非克利福德门,通常通过魔法状态准备来实现.
研究的目的:
- 为旋转表面代码提供一个硬件高效和可扩展的协议,用于任意逻辑状态的准备.
- 在超导量子处理器上实验性地实现该协议.
主要方法:
- 开发一种用于逻辑状态准备的新型协议.
- 在Zuchongzhi 2.1超导量子处理器上进行实验实施.
- 对于准备好的魔法状态的逻辑忠实性的表征.
主要成果:
- 实现了距离三逻辑状态的0.8983±0.0002的平均逻辑忠实度.
- 准备好的逻辑魔术状态是A^{π/4}_{L},H_{L},和T_{L},其忠度分别为0.8771±0.0009,0.9090±0.0009和0.8890±0.0010.
- 忠诚度超过国家蒸协议的确定的值.
结论:
- 提出的协议提供了一种可行和有效的方法,用于生成高保真度原始逻辑魔术状态.
- 这对于在表面代码框架内实现非Clifford逻辑门至关重要.
- 这项工作为实用,大规模的容错量子计算机铺平了道路.
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