Takamoto M, Katori H, Marmo S I, Ovsiannikov V D, Pal'chikov V G
Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, Bunkyo-ku, 113-8656 Tokyo, Japan and CREST, Japan.
Phys Rev Lett. 2009 Feb 13;102(6):063002. doi: 10.1103/PhysRevLett.102.063002. Epub 2009 Feb 10.
We investigated the properties of optical lattice clocks operated with a repulsive light-shift potential. The magic wavelength, where light-shift perturbation for the clock transition cancels, was experimentally determined to be 389.889(9) nm for 87Sr. The hyperpolarizability effects on the clock transition were investigated theoretically. With minimal trapping field perturbation provided by the blue-detuned lattice, the fractional uncertainty due to the hyperpolarizability effects was found to be 2x10;{-19} in the relevant clock transition.
