中国物理B ›› 2021, Vol. 30 ›› Issue (8): 88501-088501.doi: 10.1088/1674-1056/abea96

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Shortcut-based quantum gates on superconducting qubits in circuit QED

Zheng-Yin Zhao(赵正印), Run-Ying Yan(闫润瑛), and Zhi-Bo Feng(冯志波)   

  1. School of Science, Xuchang University, Xuchang 461000, China
  • 收稿日期:2021-01-06 修回日期:2021-01-29 接受日期:2021-03-01 出版日期:2021-07-16 发布日期:2021-07-16
  • 通讯作者: Zhi-Bo Feng E-mail:zbfeng010@163.com
  • 基金资助:
    Project supported by the Natural Science Foundation of Henan Province, China (Grant No. 212300410388) and the "316" Project Plan of Xuchang University.

Shortcut-based quantum gates on superconducting qubits in circuit QED

Zheng-Yin Zhao(赵正印), Run-Ying Yan(闫润瑛), and Zhi-Bo Feng(冯志波)   

  1. School of Science, Xuchang University, Xuchang 461000, China
  • Received:2021-01-06 Revised:2021-01-29 Accepted:2021-03-01 Online:2021-07-16 Published:2021-07-16
  • Contact: Zhi-Bo Feng E-mail:zbfeng010@163.com
  • Supported by:
    Project supported by the Natural Science Foundation of Henan Province, China (Grant No. 212300410388) and the "316" Project Plan of Xuchang University.

摘要: 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.

关键词: superconducting qubit, circuit QED, quantum gate, shortcuts to adiabaticity

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.

Key words: superconducting qubit, circuit QED, quantum gate, shortcuts to adiabaticity

中图分类号:  (Superconducting devices)

  • 85.25.-j
42.50.Pq (Cavity quantum electrodynamics; micromasers) 03.67.Lx (Quantum computation architectures and implementations) 32.80.Xx (Level crossing and optical pumping)