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作 者:许鹏 张然 赵生妹 Peng Xu;Ran Zhang;Sheng-Mei Zhao(Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)
出 处:《Chinese Physics B》2023年第2期117-122,共6页中国物理B(英文版)
基 金:supported by the National Natural Science Foundation of China (Grant Nos. 12105146 and 12175104);supported by the National Natural Science Foundation of China (Grant No. 61871234);sponsored by NUPTSF (Grant No. NY220178)。
摘 要:High-dimensional quantum systems, such as qutrits(quantum three-level systems), have multiple accessible energy levels beyond the two-level qubits. Therefore, qutrits can offer a larger state space to improve the efficiency of quantum computation. Here, we demonstrate a high-fidelity iSWAP-like gate operation on a frequency-tunable superconducting qutrits system. The superconducting quantum system consists of two qutrits that are coupled via a resonator with fixed qutrit-resonator coupling strengths. Through designing the frequency pulse profile and optimizing the parameter values,the gate error can be suppressed below 1.5 × 10^(-3). To bear out the feasibility of the proposal, we have conducted our study with experimentally accessible parameters. As the resonator can mediate the interaction between the irrelevant qutrits, the presented approach can also be used to couple multiple qutrits together, providing a good platform for quantum information processing.
关 键 词:circuit quantum electrodynamics(circuit QED) superconducting qutrit iSWAP-like gate
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