Robust Strong-Coupling Architecture in Circuit Quantum Electrodynamics
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-10-25
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Language
en
Pages
11
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Physical Review Applied, Volume 16, issue 4
Abstract
We report on a robust method to achieve strong coupling between a superconducting flux qubit and a high-quality quarter-wavelength coplanar waveguide resonator. We demonstrate the progression from the strong to ultrastrong coupling regime by varying the length of a shared inductive coupling element, ultimately achieving a qubit-resonator coupling strength of 655 MHz, 10% of the resonator frequency. We derive an analytical expression for the coupling strength in terms of circuit parameters and also discuss the maximum achievable coupling within this framework. We experimentally characterize flux qubits coupled to superconducting resonators using one- and two-tone spectroscopy methods, demonstrating excellent agreement with the proposed theoretical model.Description
| openaire: EC/H2020/742559/EU//SQH | openaire: EC/H2020/766025/EU//QuESTech
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Citation
Upadhyay , R , Thomas , G , Chang , Y C , Golubev , D S , Guthrie , A , Gubaydullin , A , Peltonen , J T & Pekola , J P 2021 , ' Robust Strong-Coupling Architecture in Circuit Quantum Electrodynamics ' , Physical Review Applied , vol. 16 , no. 4 , 044045 . https://doi.org/10.1103/PhysRevApplied.16.044045
