Cross cross resonance gate

Abstract

Implementation of high-fidelity swapping operations is of vital importance to execute quantum algorithms on a quantum processor with limited connectivity. We present an efficient pulse control technique, cross-cross resonance (CCR) gate, to implement iSWAP and SWAP operations with dispersively-coupled fixed-frequency transmon qubits. The key ingredient of the CCR gate is simultaneously driving both of the coupled qubits at the frequency of another qubit, wherein the fast two-qubit interaction roughly equivalent to the XY entangling gates is realized without strongly driving the qubits. We develop the calibration technique for the CCR gate and evaluate the performance of iSWAP and SWAP gates The CCR gate shows roughly two-fold improvement in the average gate error and more than 10~\% reduction in gate times from the conventional decomposition based on the cross resonance gate.

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Cited by in corpus (14)

• Circuit knitting with classical communication
• Mitigating off-resonant error in the cross-resonance gate
• Native two-qubit gates in fixed-coupling, fixed-frequency transmons beyond cross-resonance interaction
• All-microwave manipulation of superconducting qubits with a fixed-frequency transmon coupler
• Taming quantum systems: A tutorial for using shortcuts-to-adiabaticity, quantum optimal control, and reinforcement learning
• Continuous quantum gate sets and pulse class meta-optimization
• Co-Designed Architectures for Modular Superconducting Quantum Computers
• Correction Formulas for the Mølmer-Sørensen Gate Under Strong Driving
• Remote Cross-resonance Gate between Superconducting Fixed-frequency Qubits
• Floquet Analysis of Frequency Collisions
• Overhead in Quantum Circuits with Time-Multiplexed Qubit Control
• Microwave-activated high-fidelity three-qubit gate scheme for fixed-frequency superconducting qubits
• Systematic Construction of Time-Dependent Hamiltonians for Microwave-Driven Josephson Circuits
• Review of Superconducting Qubit Devices and Their Large-Scale Integration