Three-dimensional optical lattice clock with bosonicSr88atoms

We present detailed analyses of our recent experiment on the three-dimensional (3D) optical lattice clock with bosonic ${}^{88}\mathrm{Sr}$ atoms in which the collisional frequency shift was suppressed by applying a single-occupancy lattice. Frequency shifts in magnetically induced spectroscopy on the ${}^1{S}_0–{}^3{P}_0$ clock transition ($\lambda =698$ nm) of ${}^{88}\mathrm{Sr}$ were experimentally investigated by referencing a one-dimensional (1D) lattice clock based on spin-polarized ${}^{87}\mathrm{Sr}$ 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 ${\sigma }_y(\tau )=2\times {10}^{-16}/\sqrt{\tau }$ by optimizing the cycle time of the clock operation. DOI: http://dx.doi.org/10.1103/PhysRevA.81.023402 © 2010 The American Physical Society