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David Hume (Fed)

Physicist

David Hume is a staff physicist in the Ion Storage Group. His projects aim at developing and improving optical clocks using quantum metrology techniques. Notably, quantum-logic spectroscopy allows for precision measurement of a broad array trapped-ion species that cannot be directly laser cooled or detected. His group operates optical clocks based on quantum logic spectroscopy of aluminum ions and uses them for applications ranging from frequency standards to fundamental physics.

Awards

NIST Bronze Medal, Precision Molecular Spectroscopy, 2021

NIST Gold Medal, Optical Clock Network, 2019

Humboldt Research Fellowship, 2012

National Research Council Fellowship, 2011

Publications

High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty

Author(s)
Mason Marshall, Daniel Rodriguez Castillo, Willa Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Nicholas Nardelli, Tara Fortier, Jun Ye, David Ray Leibrandt, David Hume
We report a single-ion optical atomic clock with fractional frequency uncertainty of 5.5 x 10^-19 and frequency stability of 3.5 x 10^-16/sqrttau/s}, based on

Patents (2018-Present)

Spherical Ion Trap and Trapping Ions

NIST Inventors
Jeffrey Sherman , David Hume and Roger Brown
A spherical ion trap includes a substrate and an ion aperture; two RF electrodes in electrostatic communication with an ion trapping region; RF ground electrodes in electrostatic communication with the ion trapping region; and the ion trapping region bounded by opposing RF electrodes and the RF
Created October 23, 2018, Updated December 8, 2022