On-demand entanglement of molecules in a reconfigurable optical tweezer array

Entanglement is crucial to many quantum applications including quantum information processing, quantum simulation, and quantum-enhanced sens- ing. Because of their rich internal structure and interactions, molecules have been proposed as a promising platform for quantum science. Determinis- tic entanglement of individually controlled molecules has nevertheless been a long-standing experimental challenge. Here we demonstrate on-demand en- tanglement of individually prepared molecules. We deterministically create Bell pairs of molecules by using the electric dipolar interaction between polar molecules prepared using a reconfigurable array of optical tweezer traps. Our results demonstrate the key building blocks needed for quantum applications and may advance quantum-enhanced fundamental physics tests using trapped molecules.

Methods
The dataset comprises 1) quantities extracted experimentally from binarized molecular fluorescence images 2) numerical simulation results. The binarization procedure and the relevant numerical simulation procedures are described in the methods and supplementary material. Full binarized datasets are available upon request. These binarized datasets do not contain additional information than the provided data files.