Hume, D.
and Leibrandt, D.
(2016),
Probing beyond the laser coherence time in optical clock comparisons, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevA.93.032138
(Accessed April 26, 2024)
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Probing beyond the laser coherence time in optical clock comparisons
Published
Author(s)
,
Abstract
We develop protocols that circumvent the laser noise limit in optical clock comparisons by synchronous probing of two clocks using phase-locked local oscillators. This allows for probe times longer than the laser coherence time, avoids the Dick effect, and supports Heisenberg-limited scaling of measurement precision. We present a model for such frequency comparisons and develop numerical simulations of the protocol with realistic noise sources. This provides a route to reduce frequency ratio measurement durations by more than an order of magnitude as clock inaccuracies reach 1x10-18.Citation
Physical Review Letters
Volume
A 93
Pub Type
Journals
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Keywords
atomic clock, optical clock, optical lattice, quantum metrology, trapped ion
Citation
Created March 30, 2016, Updated November 10, 2018