Spin-Exchange Interactions and On-Demand Entanglement of Laser-cooled Molecules in an Optical Tweezer Array

Molecules, with their rich structure and tunable long-range interactions, have been proposed as a versatile platform for quantum science. In this talk, I will report on recent advances from our group on manipulating and controlling individual laser-cooled molecules. In particular, I will report on observations of coherent spin-exchange interactions between individual CaF molecules trapped in a reconfigurable optical tweezer array. Using spin-exchange interactions, we also implement a 2-qubit iSWAP gate to create entangled Bell pairs of molecules on-demand. Our results pave the way for quantum information processing and quantum simulation using molecular tweezer arrays. For quantum information, the iSWAP gate, combined with local control available in optical tweezer experiments, allow for universal quantum computing with molecular qubits. For quantum simulation, spin-exchange interactions form the building block for realizing a variety of quantum spin models. Together with microscopic readout, control, and the ability to create arbitrary trapping geometries, molecular tweezer arrays could be a powerful new platform to study these models in a bottom-up approach.