Feshbach resonances in Na 23 + K 39 mixtures and refined molecular potentials for the NaK molecule

authored by: Torsten Hartmann, Torben A. Schulze, Kai K. Voges, Philipp Gersema, Matthias W. Gempel, Eberhard Tiemann, Alessandro Zenesini, Silke Ospelkaus
Abstract: We present a detailed study of interspecies Feshbach resonances of the bosonic Na23+K39 mixture for magnetic fields up to 750G in various collision channels. A total of 14 Feshbach resonances are reported, as well as four zero crossings of the scattering length and three inelastic two-body loss features. We use the observed magnetic-field locations of the resonant features together with the known data on Na23+K40 to refine the singlet and triplet ground-state potentials of NaK and achieve a consistent description of Feshbach resonances for both the Bose-Bose mixture of Na23+K39 and the Bose-Fermi mixture of Na23+K40. We also discuss the influence of the interplay between inelastic two-body and three-body processes on the observation of a Feshbach resonance.
Organisation(s): Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
Type: Article
Journal: Physical Review A
Volume: 99
ISSN: 2469-9926
Publication date: 27.03.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics
Electronic version(s): https://arxiv.org/abs/1810.00608 (Access: Open)
https://doi.org/10.1103/PhysRevA.99.032711 (Access: Closed)

BibTeX

@article{52b4c526c6de4e69919a1968630a318d,
title = "Feshbach resonances in Na 23 + K 39 mixtures and refined molecular potentials for the NaK molecule",
abstract = "We present a detailed study of interspecies Feshbach resonances of the bosonic Na23+K39 mixture for magnetic fields up to 750G in various collision channels. A total of 14 Feshbach resonances are reported, as well as four zero crossings of the scattering length and three inelastic two-body loss features. We use the observed magnetic-field locations of the resonant features together with the known data on Na23+K40 to refine the singlet and triplet ground-state potentials of NaK and achieve a consistent description of Feshbach resonances for both the Bose-Bose mixture of Na23+K39 and the Bose-Fermi mixture of Na23+K40. We also discuss the influence of the interplay between inelastic two-body and three-body processes on the observation of a Feshbach resonance.",
author = "Torsten Hartmann and Schulze, {Torben A.} and Voges, {Kai K.} and Philipp Gersema and Gempel, {Matthias W.} and Eberhard Tiemann and Alessandro Zenesini and Silke Ospelkaus",
note = "Funding information: We gratefully acknowledge financial support from the European Research Council through ERC Starting Grant POLAR and from the Deutsche Forschungsgemeinschaft (DFG) through CRC 1227 (DQ-mat), project A03, and FOR2247, project E5. K.K.V. thanks the Deutsche Forschungsgemeinschaft for financial support through Research Training Group 1991.",
year = "2019",
month = mar,
day = "27",
doi = "10.1103/PhysRevA.99.032711",
language = "English",
volume = "99",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "3",
}