Demonstration of Spin Squeezing with Polar Molecules

Polar molecules hold promise in many areas of quantum science, including simulation of quantum many-body systems, quantum information processing, and quantum metrology. In this talk, we report the creation of metrologically useful many-body entangled states of molecules trapped in programmable optical tweezer arrays. Specifically, we report the first realization of spin-squeezed states of molecules. These entangled states provide metrological gain through reducing quantum projection noise. Our results open the door to quantum-enhanced precision measurement using trapped polar molecules, a new approach that is pursued in proposed and ongoing precision measurement experiments that probe beyond-standard-model physics.