2018/11/20 by Tenghui Wang, Zhenxing Zhang, Liang Xiang +10 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Adiabatic process #Algorithm #Computer science #Fidelity #Hamiltonian (control theory) #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum gate #Quantum mechanics #Qubit #Realization (probability) #Scrambling #Topology (electrical circuits) #Transmon #quant-ph
paper · pdf · doi:10.1103/physrevapplied.11.034030
published as Phys. Rev. Applied 11, 034030 (2019) · 7 pages, 4 figures
arxiv created 2018/11/20 · openalex created_date 2018/11/29 · openalex publication_date 2019/03/13 · arxiv updated 2019/03/27 · openalex updated_date 2026/08/06
In quantum information processing, the shortcut-to-adiabaticity (STA) protocol has been proposed to accelerate a system's adiabatic evolution by introducing an additional, counterdiabatic Hamiltonian. This protocol is particularly suitable for realizing the controlled-Z (C\phantom\rule00exZ) gate, but a counterdiabatic Hamiltonian requires a variable, complex coupling of qubits. By introducing a representation transformation and a rescaling method, this work uses the STA protocol to obtain a high-fidelity C\phantom\rule00exZ gate with two coupled transmon qubits. This method affords high flexibility in the evolution time and control waveform, and is expected to be directly useful in other quantum systems as well.