1. National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA;2. JILA, National Institute of Standards and Technology and University of Colorado Department of Physics, 440 UCB, Boulder, CO 80309, USA
Abstract:
Optical lattice clocks have made significant leaps forward in recent years, demonstrating the ability to measure time/frequency at unprecedented levels. Here we highlight this progress, with a particular focus on research efforts at NIST and JILA. We discuss advances in frequency instability and the characterization of key systematic effects, with a brief outlook to the future.