Interfacing Rydberg atoms with a chip-based superconducting microwave resonator using an ac-Stark-shifted single-photon transition
Year: 2025
Type: article
Abstract: Helium atoms in the 1 s 50 s S 1 3 Rydberg level have been resonantly coupled to the 2 π × 11.722 GHz second harmonic mode of a chip-based superconducting coplanar wave-guide microwave resonator. To achieve this, the single-photon electric-dipole-allowed 1 s 50 s S 1 3 → 1 s 50 p P J 3 transition was tuned into resonance with the resonator mode through the ac Stark shift induced by a second strong 2 π × 3.350 GHz microwave dressing field. The effects of this dressing field, and residual uncanceled dc electric fields at the location of the atoms close to the superconducting chip surface were interpreted with support from Floquet calculations of the energy level structure of the Rydberg states. To observe appreciable population transfer in the 1 µ s atom-resonator interaction time using this transition, which had an electric dipole moment of 1500 e a 0 , pulsed microwave fields were injected into the resonator. From the photon occupation number in the resonator mode under these conditions, the single-photon Rabi frequency associated with the coupling of the atoms to the resonator was estimated to be ∼ 2 π × 100 Hz . These results represent an important step toward operation of this Rydberg-atom–superconducting-circuit interface in the single-photon strong-coupling regime.
Source: Physical Review A
DOI: 10.1103/hzd4-1x22
Authors: L. L. Brown, I. K. Bhangoo, S. D. Hogan
Institution: University College London
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,675
OpenAlex ID: W4417411364