论文标题
基准在单个超导量子计算平台中，不同参数两分门的噪声灵敏度
Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
论文作者
论文摘要
在单个量子计算平台上利用不同类型的两分门的可能性增加了量子算法的分解中的灵活性。较大的硬件本地门集可以减少所需门的数量，前提是所有门都以高保真度实现。在这里，我们使用参数驱动的可调耦合器对受控-z（CZ）和Exchange-type（ISWAP）门进行基准测试，该耦合器介导了两个超导量子器之间的相互作用。使用随机基准协议，我们估计每个门的错误分别为$ 0.9 \ pm0.03 \％$和$ 1.3 \ pm0.4 \％$ $ $ $ $ $ $ $ $ $ $ FIDELITY和ISWAP门。我们认为，虚假的$ ZZ $型耦合是ISWAP门的主要误差源，并且所有微波驱动器的相位稳定性至关重要。在将量子算法映射到真实硬件时，必须考虑到不同两倍门的可实现的保真度的这种差异。
The possibility to utilize different types of two-qubit gates on a single quantum computing platform adds flexibility in the decomposition of quantum algorithms. A larger hardware-native gate set may decrease the number of required gates, provided that all gates are realized with high fidelity. Here, we benchmark both controlled-Z (CZ) and exchange-type (iSWAP) gates using a parametrically driven tunable coupler that mediates the interaction between two superconducting qubits. Using randomized benchmarking protocols we estimate an error per gate of $0.9\pm0.03\%$ and $1.3\pm0.4\%$ fidelity for the CZ and the iSWAP gate, respectively. We argue that spurious $ZZ$-type couplings are the dominant error source for the iSWAP gate, and that phase stability of all microwave drives is of utmost importance. Such differences in the achievable fidelities for different two-qubit gates have to be taken into account when mapping quantum algorithms to real hardware.
