Gregory F. Strouse

TL;DR: This work performs a new accuracy evaluation of the JILA Sr clock, reducing many systematic uncertainties that limited previous measurements, such as those in the lattice ac Stark shift, the atoms' thermal environment and the atomic response to room-temperature blackbody radiation.

TL;DR: It is shown that silicon-based optical ring resonator devices can resolve temperature differences of 1 mK using the traditional wavelength scanning methodology.

TL;DR: In this paper, the theoretical and experimental foundations of those optical methods that are considered to be most promising to realize the unit of pressure at the highest level of metrology are reviewed.

TL;DR: A refractometer that utilizes two Fabry-Perot cavities formed on a dimensionally stable spacer that can be used as a high-resolution, multi-decade pressure sensor and the reference value to a mercury manometer is compared.

TL;DR: In this article, a comparison of water triple point cells from 20 national metrology institutes were carried out and compared with two reference cells with the highest accuracy with two small day-to-day changes of the reference cells were determined by a least-squares technique.