Cold-collision-shift cancellation and inelastic scattering in a Yb optical lattice clock
Cold-collision-shift cancellation and inelastic scattering in a Yb optical lattice clock
Recently, p-wave cold collisions were shown to dominate the density-dependent shift of the clock transition frequency in a 171Yb optical lattice clock. Here we demonstrate that by operating such a system at the proper excitation fraction, the cold collision shift is canceled below the 5x10^{-18} fractional frequency level. We report …