Strong zero-field F\"orster resonances in K-Rb Rydberg systems
- URL: http://arxiv.org/abs/2009.02004v1
- Date: Fri, 4 Sep 2020 04:25:03 GMT
- Title: Strong zero-field F\"orster resonances in K-Rb Rydberg systems
- Authors: J.Susanne Otto, Niels Kj{\ae}rgaard and Amita B. Deb
- Abstract summary: We study resonant dipole-dipole coupling and the associated van der Waals energy shifts in Rydberg excited atomic rubidium and potassium.
We crucially identify the existence of an ultrastrong, "low" electric field K-Rb F"orster resonance with a extremely large zero-field crossover distance.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study resonant dipole-dipole coupling and the associated van der Waals
energy shifts in Rydberg excited atomic rubidium and potassium and investigate
F\"orster resonances between interspecies pair states. A comprehensive survey
over experimentally accessible pair state combinations reveals multiple
candidates with small F\"orster defects. We crucially identify the existence of
an ultrastrong, "low" electric field K-Rb F\"orster resonance with a extremely
large zero-field crossover distance exceeding 100 $\mu$m between the van der
Waals regime and the resonant regime. This resonance allows for a strong
interaction over a wide range of distances and by investigating its dependence
on the strength and orientation of external fields we show this to be largely
isotropic. As a result, the resonance offers a highly favorable setting for
studying long-range resonant excitation transfer and entanglement generation
between atomic ensembles in a flexible geometry. The two-species K-Rb system
establishes a unique way of realizing a Rydberg single-photon optical
transistor with a high-input photon rate and we specifically investigate an
experimental scheme with two separate ensembles.
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