High-fidelity √(iSWAP) gates using a fixed coupler driven by two microwave pulses

2024/04/27 by Peng Xu, Haitao Zhang, Xu, Peng +3
Engineering · #Optical Network Technologies #Advanced Photonic Communication Systems #Photonic and Optical Devices

paper · pdf · doi:10.48550/arxiv.2404.17824

Abstract

Attaining high-fidelity two-qubit gates represents a pivotal quantum operation for the realization of large-scale quantum computation and simulation. In this study, we propose a microwave-control protocol for the implementation of a two-qubit gate employing two transmon qubits coupled via a fixed-frequency transmon coupler. This protocol entails applying two microwave pulses exclusively to the coupler, thereby inducing interaction between the fixed-frequency transmon qubits. This interaction facilitates the realization of √(iSWAP) gates. Additionally, we explore the implementation of the gate scheme in two distinct qubit architectures. Demonstrating with experimentally accessible parameters, we show that high-fidelity √(iSWAP) gates can be achieved

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