Three-dimensional optical lattice clock with bosonic 88Sr atoms

We present detailed analyses of our recent experiment on the three-dimensional (3D) optical lattice clock with bosonic Sr-88 atoms in which the collisional frequency shift was suppressed by applying a single-occupancy lattice. Frequency shifts in magnetically induced spectroscopy on the S-1(0)-P-3(0) clock transition (lambda = 698 nm) of Sr-88 were experimentally investigated by referencing a one-dimensional (1D) lattice clock based on spin-polarized Sr-87 atoms. We discuss that the clock stability is limited by the current laser stability as well as the experimental sequence of the clock operation, which may be improved to sigma(y) (tau) = 2 x 10(-16)/root tau by optimizing the cycle time of the clock operation.