Trapping Cold Neutral Atoms with a Nanofiber for a Hybrid Quantum System*

We explore uses of atoms trapped in the evanescent optical field near a 500-nm diameter nanofiber for the creation of a hybrid quantum system by magnetically coupling to a superconducting(SC) circuit. Optically-trapped Rb atoms loaded from a grating MOT (GMOT) in a dilution refrigerator can be transported and coupled to the magnetic field of a high-Q SC resonator operating at the Rb ground state hyperfine frequency (6.8 GHz). The resonator can be coupled to a SC qubit to form a hybrid quantum system. We will present our current research progress, including fabrication of ultra-low loss nanofibers, a sub-Doppler cooled GMOT, progress toward atom trapping, design for atom/SC integration, and effects of optical power on the SC circuit.