The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance

Abstract

The effect of collision energy on the magnetically tuned 6Li-6Li Feshbach resonance (FR) is investigated theoretically by using the coupled-channel (CC) method for the collision energy ranging from 1 to 100 (μK · kB). At the collision energy of 1 μK · kB, the resonance positions calculated are 543.152 G (s wave), 185.109 G (p wave |m l | = 0) and 185.113 G (p wave |m l | = 1), respectively. The p-wave FR near 185 G exibits a doublet structure of 4 mG, associated with dipole-dipole interaction. With the increase of the collision energy, it is found that the splitting width remains the same (4 mG), and that the resonance positions of s and p waves are shifted to higher magnetic fields with the increase of collision energy. The variation of the other quantities include the resonance width and the amplitude of the total scattering section are also discussed in detail. The thermally averaged elastic rate coefficients at T = 10, 15, 20, 25 K are calculated and compared.

Quantum Dynamics Studies of the Li + Na2 (V = 0, j = 0) → Na + NaLi Reaction on a New Neural Network Potential Energy Surface

“…Alkali metal atoms have attracted much attention in the study of ultracold atoms and molecules because of their unique electronic structure. , Triatomic and tetratomic reaction systems composed of alkali metal atoms are the most studied systems in cold and ultracold reactions. − In particular, long-lived complexes are formed in these reactions, which also opens up the possibility of directly observing intermediates in the reactions. As the complex-forming mechanism plays a dominant role in these reactions, the SQM method has been widely employed in many studies to investigate the reaction dynamics under ultracold conditions.…”