Demonstration of a state-insensitive, compensated nanofiber trap
  We report the experimental realization of an optical trap that localizes single Cs atoms ~215 nm from surface of a dielectric nanofiber. By operating at magic wavelengths for pairs of counter-propagating red- and blue-detuned trapping beams, differential scalar light shifts are eliminated, and vector shifts are suppressed by ~250. We thereby measure an absorption linewidth \Gamma/2\pi = 5.7 \pm 0.1 MHz for the Cs 6S1/2,F=4 - 6P3/2,F'=5 transition, where \Gamma/2\pi = 5.2 MHz in free space. Optical depth d~66 is observed, corresponding to an optical depth per atom d_1~0.08. These advances provide an important capability for the implementation of functional quantum optical networks and precision atomic spectroscopy near dielectric surfaces. 
A. Goban, K. S. Choi, D. J. Alton, D. Ding, C. Lacro\^ute, M.   Pototschnig, T. Thiele, N. P. Stern, and H. J. Kimble
physics.atom-ph quant-ph