Hyperfine-resolved optical spectroscopy of ultracold ${}^{87}$Rb${}^{133}$Cs molecules: the $\mathrm{b}{}^3{\hat{I}}_0$ metastable state

Arpita Das, Albert Li Tao, Luke M. Fernley +6

Using an ultracold gas of ${}^{87}$Rb${}^{133}$Cs molecules, we perform hyperfine-resolved spectroscopy of transitions from the vibronic ground state to the lowest rovibrational states…