| 摘要 |
In an embodiment an optical lattice clock (100) comprising atoms (2) and a laser light source (4) at an operational magic frequency is provided. The atoms are capable of making a clock transition between two levels of electronic states, and the laser light source generates at least a pair of counterpropagating laser beams, each of which having a lattice- laser intensity I. The pair of counterpropagating laser beams forms an optical lattice potential for trapping the atoms at around antinodes of a standing wave created by it. The operational magic frequency is one of frequencies that have an effect of making lattice- induced clock shift of the clock transition insensitive to variation ΔI of the lattice-laser intensity I, the lattice-induced clock shift being a shift in a frequency for the clock transition of the atoms caused by the variation ΔI of the lattice-laser intensity / due to AC Stark effect on the two levels of the electronic states. |
