An Optical Lattice Clock with Spin-polarized 87Sr Atoms

TL;DR

This paper reports a highly precise measurement of the 87Sr optical lattice clock frequency using spin-polarized atoms, achieving accuracy comparable to primary standards worldwide.

Contribution

It introduces a new evaluation method for the 87Sr optical lattice clock with spin polarization, enhancing measurement precision and agreement with existing standards.

Findings

Measured clock transition frequency with fractional accuracy of 2.6×10^{-15}

Results agree with previous measurements of similar accuracy

Demonstrates the reliability of spin-polarized 87Sr atoms for optical clock standards

Abstract

We present a new evaluation of an 87Sr optical lattice clock using spin polarized atoms. The frequency of the 1S0-3P0 clock transition is found to be 429 228 004 229 873.6 Hz with a fractional accuracy of 2.6 10^{-15}, a value that is comparable to the frequency difference between the various primary standards throughout the world. This measurement is in excellent agreement with a previous one of similar accuracy.