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多通量过程断层扫描多通量过程断层扫描
Stancho G Stanchev1, Nikolay V Vitanov2
1Center for Quantum Technologies, Faculty of Physics, Sofia University, 5 James Bourchier blvd, 1164, Sofia, Bulgaria. stanchov@phys.uni-sofia.bg.
Scientific reports
|August 6, 2024
概括
我们介绍了一种新的量子过程断层扫描 (QPT) 方法,使用多个网关应用程序来提高准确性. 这种技术减少了状态准备,测量,读取和射击噪声的错误,提供了一个完整的保利转移矩阵 (PTM).
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.
- 量子错误减轻的方法
背景情况:
- 量子过程断层扫描 (QPT) 对于描述量子运算至关重要.
- 标准QPT方法容易出现错误,例如状态准备和测量 (SPAM) 错误,读取错误和射击噪声.
- 像随机基准测试这样的现有方法只能提供准确性,而不是完整的过程描述.
研究的目的:
- 引入一种新的QPT方法,提高精度和准确性.
- 为了减轻来自SPAM,读数和射击噪声在量子过程表征中的错误.
- 提供一个全面的保利转移矩阵 (PTM),而不是单一的忠实值.
主要方法:
- 在同一量子门的多个应用序列上执行QPT.
- 通过标准QPT测量多通道过程的PTM.
- 使用代和线性方法 (西尔维斯特方程) 推导单个过程的PTM.
- 在IBM量子平台上模拟和实验验证该方法.
主要成果:
- 拟议的多通道QPT方法显著减少了SPAM,读取和射击噪声错误.
- 模拟证实了代和线性演方法的效率.
- 在IBMQ_MANILA上对CNOT门的PTM和忠实性的实验性确定.
- 该方法产生了整个PTM,提供了比仅忠实度指标更多的信息.
结论:
- 与标准QPT相比,多通道QPT方法提供了更高的准确性和精度.
- 这种方法有效地对抗量子计算中常见的噪声源.
- 该技术提供了量子过程的更完整的表征,这对于构建可靠的量子计算机至关重要.
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