论文标题
ZZ自由在两个Qubit大门中
ZZ freedom in two qubit gates
论文作者
论文摘要
电路上的超导量子位表现出始终在状态依赖的相误差。此错误是由于亚MHz寄生虫相互作用驱除了非计算的计算水平。我们研究了一种一般理论，以评估看似闲置量子的静态拒绝以及微波驾驶门下纠缠量子的“动力学”排斥力之间的“静态”排斥。通过结合相同或相反的矩形符号的量子位，我们找到了静态和动态ZZ自由的特征。后者普遍消除了寄生虫的排斥，导致我们减轻高保真门的操作。我们的理论引入了新的机会，以制造完美的纠缠和未进入状态，这对于量子技术非常有用。
Superconducting qubits on a circuit exhibit an always-on state-dependent phase error. This error is due to sub-MHz parasitic interaction that repels computational levels from non-computational ones. We study a general theory to evaluate the `static' repulsion between seemingly idle qubits as well as the `dynamical' repulsion between entangled qubits under microwave driving gate. By combining qubits of either the same or opposite anharmonicity signs we find the characteristics of static and dynamical ZZ freedoms. The latter universally eliminate the parasitic repulsion, leading us to mitigate high fidelity gate operation. Our theory introduces new opportunities for making perfect entangled and unentangled states which is extremely useful for quantum technology.
