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arXiv · 1705.10019

The collisional frequency shift of a trapped-ion optical clock

Amar C. Vutha·Tom Kirchner·Pierre Dubé
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Abstract

Collisions with background gas can perturb the transition frequency of trapped ions in an optical atomic clock. We develop a non-perturbative framework based on a quantum channel description of the scattering process, and use it to derive a master equation which leads to a simple analytic expression for the collisional frequency shift. As a demonstration of our method, we calculate the frequency shift of the Sr$^+$ optical atomic clock transition due to elastic collisions with helium.

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Amar C. Vutha, Tom Kirchner, Pierre Dubé. 2017-08-31. The collisional frequency shift of a trapped-ion optical clock. https://doi.org/10.1103/physreva.96.022704

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