Speaker
Description
Optical atomic clocks are the most precise measurement tools, achieving fractional frequency uncertainties below $10^{−18}$. Transportable systems can extend this accuracy to a broader range of applications. High-precision frequency ratio measurements are essential to validate clock accuracy and ensure consistency across platforms – a key requirement towards the redefinition of the SI second. Transportable systems allow these comparisons on-site at various metrology institutes when a connecting fiber link is missing. Furthermore, transportable optical clocks can be used for relativistic geodesy as they allow height difference measurements on the cm level over large distances.
Our fully rack-integrated clock setup is based on the $^1𝑆_0\rightarrow {^3𝑃_0}$ transition in $^{27}\mathrm{Al}^+$. A co-trapped $^{40}\mathrm{Ca}^+$ ion allows for sympathetic cooling and state detection through quantum logic spectroscopy. We present the results of our investigation of various frequency shifts in our optical clock. Furthermore, we present ground state cooling, quantum logic spectroscopy, and our progress towards clock operation.
| Academic level | PhD student |
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