Magic-wavelength optical traps for Rydberg atoms

摘要

We propose blue-detuned optical traps that are suitable for trapping of both ground-state and Rydberg excitedatoms. The addition of a background compensation field or a suitable choice of the trap geometry provides a magictrapping condition for ground-state and Rydberg atoms at the trap center. Deviations from the magic condition atfinite temperature are calculated. Designs that achieve less than 200-kHz differential trap shift between Cs groundstates and 125s Rydberg states for 10 μK Cs atoms are presented. Consideration of the trapping potential andphotoionization rates suggests that these traps will be useful for quantum-information experiments with atomic qubits.