Zou, J;
Hogan, SD;
(2022)
Probing van der Waals interactions and detecting polar molecules by Förster-resonance energy transfer with Rydberg atoms at temperatures below 100 mK.
Physical Review A
, 106
(4)
, Article 043111. 10.1103/physreva.106.043111.
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Abstract
Electric-field-controlled Förster-resonance energy transfer (FRET) between Rydberg helium (He) atoms and ground-state ammonia ( NH 3 ) molecules has been studied at translational temperatures below 100 mK. The experiments were performed in an intrabeam collision apparatus with pulsed supersonic beams of NH 3 seeded in He. A range of Förster resonances, between triplet Rydberg states in He with principal quantum numbers of 38, 39, and 40, and the inversion intervals in NH 3 were investigated. Resonance widths as low as 100 ± 20 MHz were observed for Rydberg-Rydberg transitions with electric dipole transition moments of 3270 D. These widths result from binary collisions at a mean center-of-mass speed of 19.3 ± 2.6 m/s. For transitions in which the initially prepared Rydberg states were strongly polarized, with large induced static electric dipole moments, van der Waals interactions between the collision partners increased the resonance widths to ∼ 750 MHz. From measurements of the rate of FRET for the narrowest resonances observed, a density of NH 3 of ( 9.4 ± 0.3 ) × 10 9 cm − 3 in the upper ground-state inversion sublevel in the interaction region of the apparatus was determined nondestructively.
| Type: | Article |
|---|---|
| Title: | Probing van der Waals interactions and detecting polar molecules by Förster-resonance energy transfer with Rydberg atoms at temperatures below 100 mK |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physreva.106.043111 |
| Publisher version: | https://doi.org/10.1103/physreva.106.043111 |
| 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. |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10157917 |
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