Modeling Photoassociative Spectra of Ultracold NaK + K

authored by: Baraa Shammout, Leon Karpa, Silke Ospelkaus, Eberhard Tiemann, Olivier Dulieu
Abstract: A model for photoassociation of ultracold atoms and molecules is presented and applied to the case of ³⁹K and ²³Na³⁹K bosonic particles. The model relies on the assumption that photoassociation is dominated by long-range atom-molecule interactions well outside the chemical bond region. The frequency of the photoassociation laser is chosen close to a bound-bound rovibronic transition from the X¹Σ⁺ ground state toward the metastable b³Π lowest excited state of ²³Na³⁹K, allowing us to neglect any other excitation, which could hinder the photoassociation detection. The energy level structure of the long-range ³⁹K···²³Na³⁹K excited super-dimer is computed in the space-fixed frame by solving coupled-channel equations, involving the coupling between the ²³Na³⁹K internal rotation and the mechanical rotation of the super-dimer complex. A quite rich structure is obtained, and the corresponding photoassociation rates are presented. Other possible photoassociation transitions are discussed in the context of the proposed model.
Organisation(s): Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): Universite Paris-Sud
Type: Article
Journal: Journal of Physical Chemistry A
Volume: 127
Pages: 7872–7883
No. of pages: 12
ISSN: 1089-5639
Publication date: 28.09.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physical and Theoretical Chemistry
Electronic version(s): https://doi.org/10.48550/arXiv.2303.11891 (Access: Open)
https://doi.org/10.1021/acs.jpca.3c01823 (Access: Open)

BibTeX

@article{e17a7665e64248deb3c6b4c520b53e54,
title = "Modeling Photoassociative Spectra of Ultracold NaK + K",
abstract = "A model for photoassociation of ultracold atoms and molecules is presented and applied to the case of 39K and 23Na39K bosonic particles. The model relies on the assumption that photoassociation is dominated by long-range atom-molecule interactions well outside the chemical bond region. The frequency of the photoassociation laser is chosen close to a bound-bound rovibronic transition from the X1Σ+ ground state toward the metastable b3Π lowest excited state of 23Na39K, allowing us to neglect any other excitation, which could hinder the photoassociation detection. The energy level structure of the long-range 39K···23Na39K excited super-dimer is computed in the space-fixed frame by solving coupled-channel equations, involving the coupling between the 23Na39K internal rotation and the mechanical rotation of the super-dimer complex. A quite rich structure is obtained, and the corresponding photoassociation rates are presented. Other possible photoassociation transitions are discussed in the context of the proposed model.",
author = "Baraa Shammout and Leon Karpa and Silke Ospelkaus and Eberhard Tiemann and Olivier Dulieu",
note = "Funding Information: We gratefully acknowledge Dr Romain Vexiau for sharing his calculations on NaK transition dipole moments and Charbel Karam for his support in using MFGH code. B. S., L. K, and S. O. gratefully acknowledge financial support from Germany{\textquoteright}s Excellence Strategy─EXC-2123 QuantumFrontiers─390837967, the Deutsche Forschungsgemeinschaft (DFG) through CRC 1227 (DQ-mat), project A03, and the European Research Council through the ERC Consolidator grant 101045075 TRITRAMO. ",
year = "2023",
month = sep,
day = "28",
doi = "10.48550/arXiv.2303.11891",
language = "English",
volume = "127",
pages = "7872–7883",
journal = "Journal of Physical Chemistry A",
issn = "1089-5639",
publisher = "American Chemical Society",
number = "38",
}