Nanophotonic cavity cooling of cold atoms

Ultracold atoms strongly coupled to photonic fields in nanoscale waveguides and cavities have diverse applications in quantum networks, quantum nonlinear optics, and quantum simulations. For all these scenarios, the key challenge has always been efficiently cooling and trapping atoms in the evanescence field region of a nanophotonic structure. In this talk, we discuss how a cavity cooling mechanism can be used to capture a single atom in an optical microtrap near a nanophotonic cavity. In particular, a cavity-guided pump field can be used to induce position- and velocity-dependent friction force as well as momentum diffusion in all three dimensions. We conduct full 3D Monte Carlo simulations to demonstrate the efficiency and stability of our cooling and trapping scheme. Our analytical results corroborate numerical simulations without the weak-driving assumption in the parameter regime considered. Moreover, we discuss how our scheme can be implemented to current experimental platforms.