English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present a trajectory dynamically tracing compensation method to smooth thespatial fluctuation of the static magnetic field (C-field) that provides aquantization axis in the fountain clock. The C-field coil current ispoint-to-point adjusted in accordance to the atoms experienced magnetic fieldalong the flight trajectory. A homogeneous field with a 0.2 nT uncertainty isrealized compared to 5 nT under the static magnetic field with constant currentduring the Ramsey interrogation. The corresponding uncertainty associated withthe second-order Zeeman shift that we calculate is improved by one order ofmagnitude. The technique provides an alternative method to improve the magneticfield uniformity particularly for large-scale equipment that is difficult tomachine with magnetic shielding. Our method is simple, robust, and essentiallyimportant in frequency evaluations concerning the dominant uncertaintycontribution due to the quadratic Zeeman shift.

C-field smoothing by trajectory dynamically tracing compensation in rubidium fountain clock