2021/12/13 by Mun Dae Kim
Computer Science · Physics and Astronomy · #Coherence (philosophical gambling strategy) #Coherence time #Current (fluid) #Electrical engineering #Flux (metallurgy) #Flux qubit #Magnetic field #Magnetic flux #Magnetic flux quantum #Phase qubit #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Qubit #Topology (electrical circuits) #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1088/1367-2630/ac4281
published as New Journal of Physics, 24, 013003 (2022) · 15 pages, 4 figures
openalex publication_date 2021/12/13 · arxiv created 2021/12/30 · arxiv updated 2022/01/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Abstract We propose a scheme for controlling the gradiometric flux qubit (GFQ) by applying an ac bias current in a circuit-QED architecture. The GFQ is insensitive to the magnetic flux fluctuations, which at the same time makes it challenging to manipulate the qubit states by an external magnetic field. In this study, we demonstrate that an ac bias current applied to the α -junction of the GFQ can control the qubit states. Further, the present scheme is robust against the charge fluctuations as well as the magnetic flux fluctuations, promising a long coherence time for quantum gate operations. We introduce a circuit-QED architecture to perform the single and two-qubit operations with a sufficiently strong coupling strength.