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  • 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
  • (Optica Publishing Group, 2013),
  • paper ID_1_2

Comparing PTB’s optical 171Yb+ ion and 87Sr lattice clock

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Abstract

Clocks based on ultra-narrow optical transitions of single ions or atom ensembles are today’s most stable frequency standards and, moreover, their accuracy has surpassed that of microwave clocks [1,2]. Therefore, to test these clocks and also for applications like the search for variations of fundamental constants [3] it is necessary to compare these optical clocks at the best possible level, i.e. to measure optical frequency ratios [3,4,5]. Furthermore, comparisons between clocks of different types allow for establishing an international network to enable multiple cross checks.

© 2013 IEEE

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