Transportable Strontium Optical Lattice Clocks Operated Outside Laboratory at the Level of 10−18 Uncertainty. Issue 8 (31st May 2021)

• Record Type: Journal Article
• Authors: Ohmae, Noriaki; Takamoto, Masao; Takahashi, Yosuke; Kokubun, Motohide; Araki, Kuniya; Hinton, Andrew; Ushijima, Ichiro; Muramatsu, Takashi; Furumiya, Tetsuo; Sakai, Yuya; Moriya, Naoji; Kamiya, Naohiro; Fujii, Kazuaki; Muramatsu, Ryuya; Shiimado, Toshihiro; Katori, Hidetoshi
• Is Part Of: Advanced quantum technologies. Volume 4:Issue 8(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-05-31
• Subjects: optical frequency metrology -- optical lattice clock -- transportable atomic clock; Quantum theory -- Periodicals; Quantum computing -- Periodicals; Quantum chemistry -- Periodicals; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1002/qute.202100015
• Languages: English
• ISSNs: 2511-9044

Abstract

Abstract: Transportable strontium optical lattice clocks are developed with a fractional uncertainty of 5.5 × 10 −18 for applications outside laboratories. A single clock consists of a spectroscopy chamber and two laser boxes, where all lasers are based on external cavity diode lasers with an adjustment‐free, laser‐welded output coupler. When this system is transported from the laboratory at RIKEN to a broadcasting tower, the instruments experience acceleration change of 4 G at maximum. However, no serious optical misalignments are found. The demonstration opens up field applications of optical atomic clocks resolving a centimeter height difference. Abstract : A pair of transportable strontium optical lattice clocks has been developed. Each clock is less than 1 m 3 in volume. The clocks are operated at Tokyo Skytree with an uncertainty of 5.5 × 10 −18 . The results open up field applications of ultraprecise optical atomic clocks resolving height differences of acentimeter.