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Cryogenic optical lattice clocks
Nature Photonics, 2015A pair of 87Sr optical lattice clocks with a statistical agreement of 2 × 10−18 within 6,000 s has been developed. To this end, the behaviour of the blackbody radiation—a major perturbation for optical lattice clocks—was directly investigated.
Ichiro Ushijima +4 more
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Frequency Comparison between Optical Lattice Clocks
2007 Conference on Lasers and Electro-Optics - Pacific Rim, 2007Two "optical lattice clocks", which based on spin-polarized fermionic 87Sr trapped in a one-dimensional optical lattice and on bosonic 88Sr in a three-dimensional lattice, were operated simultaneously. From a beat note between the two optical clocks, stability as well as accuracy of "optical lattice clocks" was evaluated.
Hidetoshi Katori +3 more
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MAPAN, 2012
Latest progress in optical atomic clocks is so rapid that serious discussions toward the redefinition of the second is initiated. Besides single ion clocks developed since early 1980s, optical lattice clocks just invented a decade ago are one of strong candidates as a method to realize the revised definition.
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Latest progress in optical atomic clocks is so rapid that serious discussions toward the redefinition of the second is initiated. Besides single ion clocks developed since early 1980s, optical lattice clocks just invented a decade ago are one of strong candidates as a method to realize the revised definition.
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The European Physical Journal Special Topics, 2009
The Idea of using cold atoms confined in an optical lattice for an optical clock was proposed in 2001 [1]. Since then, this idea became an experimental reality. We review here the contribution of LNE-SYRTE to these developments.
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The Idea of using cold atoms confined in an optical lattice for an optical clock was proposed in 2001 [1]. Since then, this idea became an experimental reality. We review here the contribution of LNE-SYRTE to these developments.
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Operational strontium optical lattice clocks
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016), 2016We will report on the recent developments on two operational Sr optical lattice clocks (OLCs) at LNE-SYRTE. In particular, we will emphasize the progress made towards the realization of an optical frequency standard. We will present a nearly continuous operation of an OLC and its comparison with two atomic fountain clocks over a span of several weeks ...
E. Bookjans +4 more
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Frequency Metrology with Optical Lattice Clocks
Japanese Journal of Applied Physics, 2010The precision measurement of time and frequency is of great interest for a wide range of applications, including fundamental science and technologies that support broadband communication networks and the navigation with global positioning systems (GPSs).
Feng-Lei Hong, Hidetoshi Katori
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87Sr optical lattice clocks at JILA
2012 Conference on Precision electromagnetic Measurements, 2012We describe recent experimental progress with the JILA Sr optical frequency standard, which has a systematic uncertainty at the 10−16 fractional frequency level, currently limited by frequency shifts due to atomic interactions and room temperature blackbody radiation (BBR).
M. J. Martin +7 more
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Strontium Optical Lattice Clock at JILA
2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, 2007Results from the JILA optical lattice clock are presented. We report on our development of precision tools for the lattice clock, including a stabilized clock laser with sub-Hz linewidth, fs-comb based technology allowing accurate clock comparison in both the microwave and optical domains, and clock transfer over optical fiber in an urban environment ...
M. Boyd +9 more
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Optical lattice clocks and frequency comparisons
CPEM 2010, 2010To date, optical clocks based on singly trapped ions [1] and ultracold neutral atoms trapped in the Stark-shift-free optical lattices [2, 3] are regarded as promising candidates for future atomic clocks. Since 2006, “optical lattice clocks” have been evaluated close to the Cs clocks' uncertainty limit internationally [4, 5].
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Making a denser optical lattice clock
Science, 2017Optical Clocks Some of today's most advanced clocks are made up of large numbers of atoms lined up in a one-dimensional (1D) optical lattice. The numbers improve clock stability, but atomic interactions can limit accuracy. Campbell et al. loaded their fermionic strontium atoms into a 3D optical lattice.
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