Modeling the adiabatic creation of ultracold, polar ${}^{23}\mathrm{N}{\mathrm{a}}^{40}\mathrm{K}$ molecules

Abstract

In this work we model and realize stimulated Raman adiabatic passage (STIRAP) in the diatomic ${}^{23}\mathrm{N}{\mathrm{a}}^{40}\mathrm{K}$ molecule from weakly bound Feshbach molecules to the rovibronic ground state via the $|v_d=5,J=\Omega =1⟩$ excited state in the $d^3\Pi$ electronic potential. We demonstrate how to set up a quantitative model for polar molecule production by taking into account the rich internal structure of the molecules and the coupling laser phase noise. We find excellent agreement between the model predictions and the experiment, demonstrating the applicability of the model in the search of an ideal STIRAP transfer path. In total we produce 5000 fermionic groundstate molecules. The typical phase-space density of the sample is 0.03 and induced dipole moments of up to 0.54 Debye could be observed.

7 pages, 5 figures Version 2: Fixed a few typos, elaborated more on the differences between different choices of intermediate state, clarified Hönl-London factor, added a intuitive explanation of the benefits of detuned STIRAP, elaborated on realized dipole moments in diatomics, compared phase-space density reducing processes in the whole molecule creation process, added two more references

References in corpus (5)

• A High Phase-Space-Density Gas of Polar Molecules
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Quantum Engineering of a Low-Entropy Gas of Heteronuclear Bosonic Molecules in an Optical Lattice

Cited by in corpus (10)

• Observation of interference between resonant and detuned STIRAP in the adiabatic creation of ${}^{23}$Na${}^{40}$K molecules
• Efficient conversion of closed-channel dominated Feshbach molecules of ${}^{23}$Na${}^{40}$K to their absolute ground state
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• High-fidelity multistate STIRAP assisted by shortcut fields
• Magic Conditions for Multiple Rotational States of Bialkali Molecules in Optical Lattices
• High-resolution 'magic'-field spectroscopy on trapped polyatomic molecules
• Anisotropic Polarizability of Ultracold Ground-state ${}^{23}$Na${}^{87}$Rb Molecules
• A pathway to ultracold bosonic ${}^{23}{\text{Na}}^{39}\text{K}$ ground state molecules
• Study of excited electronic states of the ${}^{39}$KCs molecule correlated with the K($4^2$S)+Cs($5^2$D) asymptote: experiment and theory
• Lossy Quantum Defect Theory of Ultracold Molecular Collisions