Results 231 to 240 of about 2,598,112 (267)
Collectively enhanced Ramsey readout by cavity sub- to superradiant transition. [PDF]
Nat CommunBohr EA +8 more
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Cryogenic optical lattice clocks
Nature Photonics, 2015 A 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.
Masao Takamoto, Hidetoshi Katori
exaly +3 more sources
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.
P. Lemonde, Lemonde, Pierre
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Contributing to TAI with Sr optical lattice clocks
2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFC), 2017 In this paper, we present recent experiments conducted with two 87Sr optical lattice clocks operated at LNE-SYRTE. We report on the first calibrations of TAI with optical clocks, a necessary step towards the redefinition of the SI second. Additionally, we report on the experimental realization of a cavity-assisted non-destructive detection whose ...
Bilicki, Slawomir +5 more
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Frequency Comparison between Optical Lattice Clocks
Proceedings of SPIE, 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.
Ryoichi Higashi +2 more
exaly +4 more sources
Modeling light shifts in optical lattice clocks [PDF]
Physical Review A, 2019 We present an extended model for the lattice-induced light shifts of the clock frequency in optical lattice clocks, applicable to a wide range of operating conditions.
Filippo Bregolin +2 more
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Differential clock comparisons with a multiplexed optical lattice clock
Nature, 2022Rapid progress in optical atomic clock performance has advanced the frontiers of timekeeping, metrology and quantum science1-3. Despite considerable efforts, the instabilities of most optical clocks remain limited by the local oscillator rather than the atoms themselves4,5.
Xin Zheng +5 more
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Digest of the LEOS Summer Topical Meetings, 2005., 2005
We report on the precision spectroscopy of the 5s/sup 2/ /sup 1/S/sub o/(F=9/2)-5s5p /sup 3/P/sub o/(F=9/2) clock transition of /sup 87/Sr atoms trapped in a one-dimensional optical lattice and discuss its prospects as a future optical clock.
H. Katori +3 more
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We report on the precision spectroscopy of the 5s/sup 2/ /sup 1/S/sub o/(F=9/2)-5s5p /sup 3/P/sub o/(F=9/2) clock transition of /sup 87/Sr atoms trapped in a one-dimensional optical lattice and discuss its prospects as a future optical clock.
H. Katori +3 more
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Nature, 2005
The precision measurement of time and frequency is a prerequisite not only for fundamental science but also for technologies that support broadband communication networks and navigation with global positioning systems (GPS). The SI second is currently realized by the microwave transition of Cs atoms with a fractional uncertainty of 10(-15) (ref.
Masao, Takamoto +3 more
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The precision measurement of time and frequency is a prerequisite not only for fundamental science but also for technologies that support broadband communication networks and navigation with global positioning systems (GPS). The SI second is currently realized by the microwave transition of Cs atoms with a fractional uncertainty of 10(-15) (ref.
Masao, Takamoto +3 more
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Optics and Photonics News, 2015
A new breed of atomic clock—the “ticking” of which comes from transitions in millions of cooled atoms, trapped in optical standing waves created by tightly focused lasers—is pushing scientific timekeeping to previously unknown frontiers of precision.
Christopher W. Oates, Andrew D. Ludlow
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A new breed of atomic clock—the “ticking” of which comes from transitions in millions of cooled atoms, trapped in optical standing waves created by tightly focused lasers—is pushing scientific timekeeping to previously unknown frontiers of precision.
Christopher W. Oates, Andrew D. Ludlow
openaire +1 more source