论文标题
量子期望值的无模型读数减少措施
Model-free readout-error mitigation for quantum expectation values
论文作者
论文摘要
当前量子处理器的测量值受到导致读数错误的硬件缺陷的约束。这些错误表现为量子期望值的偏见。在这里，我们提出了一种非常简单的方法，该方法迫使期望值的偏差显示为乘法因子，可以直接测量并以可观察到的采样复杂性的增加成本来删除。该方法没有假定噪声的特定形式，但只要求噪声“弱”以避免过多的采样开销。我们提供了将期望值中的误差与样本复杂性相关的界限。
Measurements on current quantum processors are subject to hardware imperfections that lead to readout errors. These errors manifest themselves as a bias in quantum expectation values. Here, we propose a very simple method that forces the bias in the expectation value to appear as a multiplicative factor that can be measured directly and removed at the cost of an increase in the sampling complexity for the observable. The method assumes no specific form of the noise, but only requires that the noise is `weak' to avoid excessive sampling overhead. We provide bounds relating the error in the expectation value to the sample complexity.
