Bulletin of the American Physical Society
Updates on Yb optical lattice clocks at NIST
Youssef S. Hassan, William F. McGrew, Xiaogang Zhang, Robert Fasano, Daniele Nicolodi, K. Beloy, Wesley Brand, Stefan Alaric Schäffer, Roger C. Brown, Jian Yao, Jeff A. Sherman, T.E. Parker, Holly Leopardi, Tara M. Fortier, Andrew D. Ludlow