2023/10/05 by Canming He, He, Canming, Xiaoyu Nie +11
Chemistry · Physics and Astronomy · #Adiabatic process #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Atomic physics #Chemical polarity #Cold Atom Physics and Bose-Einstein Condensates #Dipole #Electric field #Excited state #FOS: Physical sciences #Ground state #Molecule #Physics #Quantum Gases (cond-mat.quant-gas) #Quantum mechanics #Raman spectroscopy #Singlet state #Spectroscopy and Laser Applications #Stark effect #Stimulated Raman adiabatic passage
paper · pdf · doi:10.48550/arxiv.2310.03300
openalex publication_date 2023/10/05 · openalex created_date 2023/10/09 · openalex updated_date 2026/07/28
We report the creation of ultracold ground state 6\textrmLi40\textrmK polar molecules with high efficiency. Starting from weakly-bound molecules state, stimulated Raman adiabatic passage (STIRAP) is adopted to coherently transfer the molecules to their singlet ro-vibrational ground state |\textrmX1Σ+,v=0,J=0>. By employing a singlet STIRAP pathway and low-phase-noise narrow-linewidth lasers, we observed a one-way transfer efficiency of 96(4) %. Held in an optical dipole trap, the lifetime of the ground-state molecules is measured to be 5.0(3) ms. The large permanent dipole moment of LiK is confirmed by applying a DC electric field on the molecules and performing Stark shift spectroscopy of the ground state. With recent advances in the quantum control of collisions, our work paves the way for exploring quantum many-body physics with strongly-interacting 6\textrmLi40\textrmK molecules.