Robust strong coupling architecture in circuit quantum electrodynamics
arXiv:2107.11135 · doi:10.1103/PhysRevApplied.16.044045
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, 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.
arXiv comment9 pages, 6 figures
References in corpus (25)
- Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
- Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
- Microwave photonics with superconducting quantum circuits
- Ultrastrong coupling regimes of light-matter interaction
- A Superconducting Persistent Current Qubit
- Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
- Ultrastrong coupling of a single artificial atom to an electromagnetic continuum in the nonperturbative regime
- Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
- Efficient and robust analysis of complex scattering data under noise in microwave resonators
- Ultrastrong coupling regime of cavity QED with phase-biased flux qubits
- An analysis method for asymmetric resonator transmission applied to superconducting devices
- Tunable photonic heat transport in a quantum heat valve
- Model for l/f Flux Noise in SQUIDs and Qubits
- Otto refrigerator based on a superconducting qubit: classical and quantum performance
- Microscopic origin of low frequency flux noise in Josephson circuits
- Inversion of Qubit Energy Levels in Qubit-Oscillator Circuits in the Deep-Strong-Coupling Regime
- Superconducting Transition and Vortex Pinning in Nb Films Patterned with Nano-scale Hole-arrays
- Localization of Metal-Induced Gap States at the Metal-Insulator Interface:Origin of Flux Noise in SQUIDs and Superconducting Qubits
- Ultrastrong coupling in two-resonator circuit QED
- Improving the performance of superconducting microwave resonators in magnetic fields
- Reducing microwave loss in superconducting resonators due to trapped vortices
- Quantization of inductively-shunted superconducting circuits
- Reducing vortex losses in superconducting microwave resonators with microsphere patterned antidot arrays
- An analysis method for transmission measurements of superconducting resonators with applications to quantum-regime dielectric-loss measurements
- Utilization of the Superconducting Transition for Characterizing Low-Quality-Factor Superconducting Resonators