1. Prospects for frequency comparison of Sr and Hg optical lattice clocks toward 10−18 uncertainties
- Author
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P. Thoumany, Takuya Ohkubo, Noriaki Ohmae, T. Ushiba, T. Akatsuka, Manoj Das, Masao Takamoto, Tetsushi Takano, Kazuhiro Yamanaka, B. T. R. Christensen, Yoichi Aso, Hidetoshi Katori, Ayaka Shoda, and Ichiro Ushijima
- Subjects
Physics ,Computer Science::Hardware Architecture ,Optical lattice ,Optics ,business.industry ,Black-body radiation ,Cryogenics ,Dead time ,business ,Noise (electronics) ,Atomic clock - Abstract
We are developing optical lattice clocks with a scope of attaining 10−18 fractional uncertainty. Cryogenic silicon cavity targeting 2×10−17 stability at 1s, will allow full utilization of the potential stability of optical lattice clocks. In order to reduce the blackbody radiation shift, which is the most serious source of uncertainties, Sr clocks in cryogenic environment and Hg clocks are underdevelopment. We discuss prospects for clock comparison, no dead time operation of the clocks and fiber link of the clocks between Riken and the University of Tokyo.
- Published
- 2012