Robust strong coupling architecture in circuit quantum electrodynamics
- URL: http://arxiv.org/abs/2107.11135v2
- Date: Thu, 7 Apr 2022 15:29:50 GMT
- Title: Robust strong coupling architecture in circuit quantum electrodynamics
- Authors: Rishabh Upadhyay, George Thomas, Yu-Cheng Chang, Dmitry S. Golubev,
Andrew Guthrie, Azat Gubaydullin, Joonas T. Peltonen, and Jukka P. Pekola
- Abstract summary: 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 element.
We experimentally characterize flux qubits coupled to superconducting resonators using one and two-tone spectroscopy methods, demonstrating excellent agreement with the proposed theoretical model.
- Score: 2.48439258515764
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- 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.
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