论文标题
差异量子算法缓解测量误差
Measurement Error Mitigation for Variational Quantum Algorithms
论文作者
论文摘要
变异量子算法（VQAS）是近期量子处理器的有前途的应用，但是其结果的质量受到噪声的极大限制。因此，已经出现了各种误差缓解技术来处理可以应用于这些算法的噪声。最近的工作引入了一种针对相关的测量误差来减轻期望值的技术，该技术可用于测量10s的测量值。我们将这些技术应用于VQA，并证明其在改善成本函数估计的有效性。此外，我们使用该技术产生的数据来实验表征测量误差，该测量误差最多可容纳20 QUBIT的设备上的设备连接。这些结果对于更好地理解VQA的近期潜力以及理解大型近期设备的测量误差的相关性应该很有用。
Variational Quantum Algorithms (VQAs) are a promising application for near-term quantum processors, however the quality of their results is greatly limited by noise. For this reason, various error mitigation techniques have emerged to deal with noise that can be applied to these algorithms. Recent work introduced a technique for mitigating expectation values against correlated measurement errors that can be applied to measurements of 10s of qubits. We apply these techniques to VQAs and demonstrate its effectiveness in improving estimates to the cost function. Moreover, we use the data resulting from this technique to experimentally characterize measurement errors in terms of the device connectivity on devices of up to 20 qubits. These results should be useful for better understanding the near-term potential of VQAs as well as understanding the correlations in measurement errors on large, near-term devices.
