IQIM Postdoctoral and Graduate Student Seminar

Abstract: Ultracold polar molecules exhibit certain features that make them an appealing resource for quantum science. Chief among them are the long-range dipole-dipole interactions between molecules and the manifold of long-lived molecular rotational states, which can be coherently controlled using microwave fields. The ability to control these features at the individual molecule level provides a rich toolbox with which to engineer quantum simulations of exotic materials or build a molecular quantum computer. We demonstrated this single-molecule quantum control using NaCs molecules assembled in optical tweezers. Using a set of new state preparation and measurement protocols, we were able to achieve full control over the rotational and hyperfine states of the molecules as well as read them out with single-molecule resolution. We then used the dipole-dipole interaction between molecules to entangle their rotational states with 94% fidelity. By mapping between rotational states and a nuclear spin qubit within each molecule, we performed an entangling iSWAP gate between them.

Lunch will be provided following the talk.