An optical tweezer array of ultracold rovibrational ground state dipolar molecules

Ultracold molecules with large electric dipoles possess a range of properties which make them attractive for a new generation of quantum information and simulation experiments. Using microwave or electric fields, the long-range electric dipole interactions between molecules can be precisely controlled, and the hyperfine manifold of molecules prepared in their rovibrational ground state can encode quantum information with long coherence times. We present here an optical tweezer array of rovibrational ground state NaCs molecules, prepared by association of laser cooled Na and Cs atoms. Using the tight confinement of optical tweezers combined with motional ground state cooling of the constituent atoms, we are able to achieve full motional and internal state control of the molecules. With this level of control in hand, we can go about engineering coherent dipolar interactions between spatially separated molecules across the array.