Photoassociation spectroscopy of $^{174}$Yb Bose-Einstein Condensate using the $^1$S$_0 \leftrightarrow ^3$P$_1$ transition

We studied the photoassociation spectrum of $^{174}$Yb Bose-Einstein condensate (BEC) using an optical Feshbach resonance near the intercombination transition (${}^1$S${}_0 - {}^3$P$_1$, 578 nm). The optical length $l_{opt}$, which characterize the interaction strength of optical Feshbach resonances, of four least-bound molecular levels ($\nu ’=-1 \sim -4$) were precisely determined by measuring the two-body loss rate at various optical powers. We also found the parameter $\eta=\Gamma_{spon}/\Gamma_{mol}$, which characterizes the enhancement of molecular loss, to be $>1$ as in the previous studies[1,2]. Our BEC apparatus and experimental scheme are also introduced in this presentation. \\ $ $ [1] Phys. Rev. Lett. 107, 073202 (2011) \\ $ $ [2] Phys. Rev. Lett. 110, 123201 (2013)