论文标题
使用IBM处理器的基于测量的交织随机基准测试
Measurement-based interleaved randomised benchmarking using IBM processors
论文作者
论文摘要
量子计算机有可能在一系列计算任务（例如素数分解和非结构化搜索）中胜过经典计算机。但是，现实世界中的量子计算机会受到噪声的影响。量化噪声至关重要，因为它通常是阻止高级量子计算成功实现的主要因素。在这里，我们提出并演示了基于测量的量子计算机的交织随机基准测定方案，可用于估计任何基于单量子测量的门的忠诚度。我们通过估计Hadamard和T Gates的保真度 - 通用的单Qubit Gate集合来测试IBM超导量子处理器的方案。在最多31吨的纠缠群集状态下进行测量。我们估计的门忠诚与量子过程断层扫描计算的那些良好一致。通过人为地增加噪声，我们能够证明我们的协议检测到栅极不同实现中的大噪声变化。
Quantum computers have the potential to outperform classical computers in a range of computational tasks, such as prime factorisation and unstructured searching. However, real-world quantum computers are subject to noise. Quantifying noise is of vital importance, since it is often the dominant factor preventing the successful realisation of advanced quantum computations. Here we propose and demonstrate an interleaved randomised benchmarking protocol for measurement-based quantum computers that can be used to estimate the fidelity of any single-qubit measurement-based gate. We tested the protocol on IBM superconducting quantum processors by estimating the fidelity of the Hadamard and T gates - a universal single-qubit gate set. Measurements were performed on entangled cluster states of up to 31 qubits. Our estimated gate fidelities show good agreement with those calculated from quantum process tomography. By artificially increasing noise, we were able to show that our protocol detects large noise variations in different implementations of a gate.
