Interfacing Rydberg atoms with a chip-based superconducting microwave resonator using an ac-Stark-shifted single-photon transition
L. L. Brown, I. K. Bhangoo, S. D. Hogan
DOI 10.1103/hzd4-1x22 · Physical Review A
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Abstract
Helium atoms in the 1s50sS13 Rydberg level have been resonantly coupled to the 2π×11.722GHz second harmonic mode of a chip-based superconducting coplanar wave-guide microwave resonator. To achieve this, the single-photon electric-dipole-allowed 1s50sS13 → 1s50pPJ3 transition was tuned into resonance with the resonator mode through the ac Stark shift induced by a second strong 2π×3.350GHz 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 1µs atom-resonator interaction time using this transition, which had an electric dipole moment of 1500ea0, 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 ∼2π×100Hz. These results represent an important step toward operation of this Rydberg-atom–superconducting-circuit interface in the single-photon strong-coupling regime.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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