821 citations · 2.1k across the 14 of their papers we have counts for
5 papers · 2 filters
High accuracy measure of atomic polarizability in an optical lattice clock
J. A. Sherman, N. D. Lemke, N. Hinkley +4
Despite being a canonical example of quantum mechanical perturbation theory, as well as one of the earliest observed spectroscopic shifts, the Stark effect contributes the largest…
Stability limits of an optical frequency standard based on free Ca atoms
J. A. Sherman, C. W. Oates
We have quantified a short term instability budget for an optical frequency standard based on cold, freely expanding calcium atoms. Such systems are the subject of renewed interest…
Cold collision shift cancelation and inelastic scattering in a Yb optical lattice clock
A. D. Ludlow, N. D. Lemke, J. A. Sherman +4
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…
p-Wave cold collisions in an optical lattice clock
N. D. Lemke, J. von Stecher, J. A. Sherman +3
We study ultracold collisions in fermionic ytterbium by precisely measuring the energy shifts they impart on the atom's internal clock states. Exploiting Fermi statistics, we uncov…
Making optical atomic clocks more stable with level laser stabilization
Y. Y. Jiang, A. D. Ludlow, N. D. Lemke +4
The superb precision of an atomic clock is derived from its stability. Atomic clocks based on optical (rather than microwave) frequencies are attractive because of their potential…