用错误矩阵的数字双胞胎进行量子过程断层扫描
Tangyou Huang1,2, Akshay Gaikwad1, Ilya Moskalenko2
1Chalmers University of Technology, Department of Microtechnology and Nanoscience, 41296 Gothenburg, Sweden.
Physical review letters
|December 19, 2025
概括
我们开发了一种增强的量子过程断层扫描 (QPT) 方法,以提高量子门验证的准确性. 这种技术完善了状态准备和测量 (SPAM) 错误学习,提高了量子计算实验的可靠性.
科学领域:
- 量子计算是一种量子计算.
- 量子信息科学是一种量子信息科学.
- 实验物理学的实验物理.
背景情况:
- 量子过程断层扫描 (QPT) 对于验证量子门和诊断普遍量子计算机中的错误至关重要.
- 国家准备和测量 (SPAM) 错误严重损害了传统QPT协议的可靠性.
- 现有的QPT方法与SPAM错误引入的固有不一致性作斗争,限制了它们的精度.
研究的目的:
- 为多量子比特系统提出和研究一种增强的QPT方法.
- 通过解决SPAM错误来提高QPT的精度和可靠性.
- 为评估量子门忠实性提供一种实用和准确的方法.
主要方法:
- 将错误矩阵集成到身份过程矩阵的数字双胞胎中.
- 使用统计精细化来学习SPAM错误.
- 在超导量子处理器上进行数值模拟和实验验证.
主要成果:
- 增强的QPT方法证明了高度准确和忠实的过程表征.
- 数字模拟证实了该方法在提高QPT精度方面的有效性.
- 实验验证显示,与标准QPT相比,至少有数量级的忠实度提高.
结论:
- 提出的方法为增强QPT提供了一个实用和精确的解决方案.
- 这种方法显著改善了对量子门忠实性的评估.
- 这些发现有助于在量子计算实验中更可靠的验证和诊断.
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