Abstract Construction of optimal gate operations is significant for quantum computation. Here an efficient scheme is proposed for performing shortcut-based quantum gates on superconducting qubits in circuit quantum electrodynamics (QED). Two four-level artificial atoms of Cooper-pair box circuits, having sufficient level anharmonicity, are placed in a common quantized field of circuit QED and are driven by individual classical microwaves. Without the effect of cross resonance, one-qubit NOT gate and phase gate in a decoupled atom can be implemented using the invariant-based shortcuts to adiabaticity. With the assistance of cavity bus, a one-step SWAP gate can be obtained within a composite qubit-photon-qubit system by inversely engineering the classical drivings. We further consider the gate realizations by adjusting the microwave fields. With the accessible decoherence rates, the shortcut-based gates have high fidelities. The present strategy could offer a promising route towards fast and robust quantum computation with superconducting circuits experimentally.
Fund: Project supported by the Natural Science Foundation of Henan Province, China (Grant No. 212300410388) and the "316" Project Plan of Xuchang University.
Zheng-Yin Zhao(赵正印), Run-Ying Yan(闫润瑛), and Zhi-Bo Feng(冯志波) Shortcut-based quantum gates on superconducting qubits in circuit QED 2021 Chin. Phys. B 30 088501
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