TY - JOUR

T1 - Modeling Photoassociative Spectra of Ultracold NaK + K

AU - Shammout, Baraa

AU - Karpa, Leon

AU - Ospelkaus, Silke

AU - Tiemann, Eberhard

AU - Dulieu, Olivier

N1 - 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’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.

PY - 2023/9/28

Y1 - 2023/9/28

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85174080240&partnerID=8YFLogxK

U2 - 10.48550/arXiv.2303.11891

DO - 10.48550/arXiv.2303.11891

M3 - Article

C2 - 37718898

AN - SCOPUS:85174080240

VL - 127

SP - 7872

EP - 7883

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

SN - 1089-5639

IS - 38

ER -