Formation of ultracold ground-state CsYb molecules via Feshbach-optimized photoassociation

Abstract

We investigate theoretically the formation of ultracold ground-state CsYb molecules on the lowest vibrational level via the Feshbach-optimized photoassociation process. Three s-wave Feshbach resonances of CsYb are found. The probability density of the scattering state in the short-range internuclear distance is significantly enhanced near the resonance positions. The population transfer efficiency reaches its maximum when the pulse duration equals half a period of the Rabi oscillation. By using the optimized laser parameters including the peak intensity and detuning, the final population of the lowest vibrational level of the ground electronic state reaches order of 10−1 in the four-laser scheme.

Potential energy curve for B1Π state of 85Rb133Cs obtained via genetic algorithm

“…With precise PEC, accurate rovibrational wave functions and Frank-Condon factors can be calculated, which can be used to fit the photoassociation spectrum [11]. Besides, precise PEC is vital for accurate numerical simulation of the photoassociation process, facilitating the exploration of efficient photoassociation pathways [12][13][14]. The PEC for the lowest 1 Π state, namely B 1 Π state, has been studied extensively.…”

Formation of ultracold singlet ground state 39K87Rb molecules via Feshbach-optimized photoassociation

“…Ultracold molecules are mostly prepared by photoassociation (PA) [7] and magnetoassociation (MA) [8]. Recently, the research of ultracold diatomic molecules has been extended from alkali metal atom systems, such as homonuclear Cs 2 [9], Rb 2 [10,11], Li 2 [12,13] and heteronuclear LiCs [14,15], LiRb [16,17], RbCs [18,19], NaRb [20], NaK [21], KRb [22] to alkaline earth metal atom systems and rare earth metal atom systems, such as Sr 2 [23], CsYb [24], and Eu 2 [25]. In * Author to whom any correspondence should be addressed.…”

Full optical preparation of an absolute ground-state ultracold CsYb molecule via laser-assisted self-induced Feshbach resonance

“…The preparation methods of ultracold molecules include photoassociation (PA) [27], magnetoassociation (MA) [28] and magnetic Feshbach-optimized photoassociation (FOPA) * Author to whom any correspondence should be addressed. [29,30]. The MA and FOPA approaches depend on the magnetic Feshbach resonance (MFR) [31].…”