Walker, DM;
Morgan, AA;
Hogan, SD;
(2020)
Cavity-enhanced Ramsey spectroscopy at a Rydberg-atom–superconducting-circuit interface.
Applied Physics Letters
, 117
(20)
, Article 204001. 10.1063/5.0024176.
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Abstract
The coherent interaction of Rydberg helium atoms with microwave fields in a λ/4 superconducting coplanar waveguide resonator has been exploited to probe the spectral characteristics of an individual resonator mode. This was achieved by preparing the atoms in the 1s55s 3S1 Rydberg level by resonance enhanced two-color two-photon excitation from the metastable 1s2s 3S1 level. The atoms then traveled over the resonator in which the third harmonic microwave field, at a frequency of ωres=2π×19.556 GHz, drove the two-photon 1s55s 3S1 → 1s56s 3S1 transition. By injecting a sequence of Ramsey pulses into the resonator and monitoring the coherent evolution of the Rydberg state population by state-selective pulsed electric field ionization as the frequency of the microwave field was tuned, spectra were recorded that allowed the resonator resonance frequency and quality factor to be determined with the atoms acting as microscopic quantum sensors.
| Type: | Article |
|---|---|
| Title: | Cavity-enhanced Ramsey spectroscopy at a Rydberg-atom–superconducting-circuit interface |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0024176 |
| Publisher version: | https://doi.org/10.1063/5.0024176 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Rydberg states, Quantum computing, Superconducting devices, Spectroscopy, Quantum information, Microwave radiation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10115741 |
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