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Roger Brown (Fed)

Roger Brown is a Physicist in the Neutral Atom Optical Clocks group in the Time & Frequency Division at NIST. His work focuses on the development of a transportable Ytterbium optical lattice clock. This project will contribute to the redefinition of the SI second, benchmark novel commercial and industrial optical clocks, and act as a quantum sensor to test the theory of General Relativity via geodetic measurements.

https://www.nist.gov/programs-projects/portable-optical-lattice-clock 

Full texts of all TF division publications: https://tf.nist.gov/general/publications.htm

Full publication list on Google Scholar  

Awards

Publications

Blackbody radiation Zeeman shift in Rydberg atoms

Author(s)
Kyle Beloy, Benjamin Hunt, Roger Brown, Tobias Bothwell, Youssef Hassan, Jacob Siegel, Tanner Grogan, Andrew Ludlow
We consider the Zeeman shift in Rydberg atoms induced by room-temperature blackbody radiation (BBR). BBR shifts to the Rydberg levels are dominated by the

Lattice Light Shift Evaluations In a Dual-Ensemble Yb Optical Lattice Clock

Author(s)
Tobias Bothwell, Roger Brown, Benjamin Hunt, Jacob Siegel, Tanner Grogan, Youssef Hassan, Kyle Beloy, Andrew Ludlow, Kurt Gibble, Takumi Kobayashi, Marianna Safronova, Sergey Porsev
In state-of-the-art optical lattice clocks, beyond-electric-dipole polarizability terms lead to a break-down of magic wavelength trapping. In this Letter, we

Clock-line-mediated Sisyphus Cooling

Author(s)
Jacob Siegel, Benjamin Hunt, Tanner Grogan, Youssef Hassan, Kyle Beloy, Roger Brown, Andrew Ludlow, Chun-Chia Chen, Kurt Gibble
We demonstrate sub-recoil Sisyphus cooling using the long-lived 3P0 clock state in alkaline-earthlike ytterbium. A 1388 -nm optical standing wave nearly
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Patents (2018-Present)

Depiction of high-efficiency microfabricated spherical RF Paul Ion Trap for trapping single atomic ions.

Spherical Ion Trap and Trapping Ions

NIST Inventors
Jeffrey Sherman , David Hume and Roger Brown
This invention is a new type of spherical RF Paul ion trap with thermal and electrical properties that are favorable for high-accuracy atomic clocks.
View All Patents
Created July 7, 2020, Updated December 9, 2024
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