A transportable optical lattice clock with $7\times 10^{-17}$ uncertainty

Abstract

We present a transportable optical clock (TOC) with ${}^{87}$Sr. Its complete characterization against a stationary lattice clock resulted in a systematic uncertainty of $7.4\times 10^{-17}$ which is currently limited by the statistics of the determination of the residual lattice light shift. The measurements confirm that the systematic uncertainty is reduceable to below the design goal of $1\times 10^{-17}$. The instability of our TOC is $1.3\times 10^{-15}/\sqrt{(\tau /s)}$. Both, the systematic uncertainty and the instability are to our best knowledge currently the best achieved with any type of transportable clock. For autonomous operation the TOC is installed in an air-conditioned car-trailer. It is suitable for chronometric leveling with sub-meter resolution as well as intercontinental cross-linking of optical clocks, which is essential for a redefiniton of the SI second. In addition, the TOC will be used for high precision experiments for fundamental science that are commonly tied to precise frequency measurements and it is a first step to space borne optical clocks

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References in corpus (9)

• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• Frequency ratio of two optical clock transitions in ${}^{171}$Yb${}^{+}$ and constraints on the time-variation of fundamental constants
• Ultra-stable optical clock with two cold-atom ensembles
• Improved limit on a temporal variation of $m_p/m_e$ from comparisons of Yb${}^{+}$ and Cs atomic clocks
• Progress in Atomic Fountains at LNE-SYRTE
• Real-time geopotentiometry with synchronously linked optical lattice clocks
• Coherent optical frequency transfer at 5e-19 over a doubled 642 km fiber link
• A transportable strontium optical lattice clock
• Long range transport of ultra cold atoms in a far-detuned 1D optical lattice

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