Feedback control of persistent-current oscillation based on the atomic-clock technique
arXiv:1805.00594 · doi:10.1103/PhysRevA.97.053813
Abstract
We propose a scheme of stabilizing the persistent-current Rabi oscillation based on the flux qubit-resonator-atom hybrid structure. The LC resonator weakly interacts with the flux qubit and maps the persistent-current Rabi oscillation onto the intraresonator electric field. This field is further coupled to a Rydberg-Rydberg transition of the Rb atom. The Rabi-frequency fluctuation of the flux qubit is deduced from measuring the atomic population and stabilized via feedback controlling the external flux bias. Our numerical simulation indicates that the feedback-control method can efficiently suppress the background fluctuations in the flux qubit, especially in the low-frequency limit. This technique may be extensively applicable to different types of superconducting circuits, paving a new way to long-term-coherence superconducting quantum information processing.
4 figures
References in corpus (10)
- Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
- Quantum feedback control of a superconducting qubit: Persistent Rabi oscillations
- Decoherence of flux qubits due to 1/f flux noise
- An experimental and theoretical guide to strongly interacting Rydberg gases
- Dephasing of a superconducting flux qubit
- Quantum information processing with single photons and atomic ensembles in microwave coplanar waveguide resonators
- Thermal Casimir-Polder shifts in Rydberg atoms near metallic surfaces
- Sensitivity of ultracold atoms to quantized flux in a superconducting ring
- Superconducting Qubit-Resonator-Atom Hybrid System
- Stabilizing Rabi Oscillation of a Charge Qubit via Atomic Clock Technique