Improved frequency ratio measurement with 87Sr and 171Yb optical lattice clocks at NMIJ
نویسندگان
چکیده
منابع مشابه
Optical lattice clocks and frequency comparison
We consider designs of optical lattice clocks in view of the quantum statistics, relevant atomic spins, and atom-lattice interactions. The first two issues lead to two optimal constructions for the clock: a one-dimensional (1D) optical lattice loaded with spin-polarized fermions and a 3D optical lattice loaded with bosons. By taking atomic multipolar interactions with the lattice fields into ac...
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We describe the recent progress in our cesium atomic fountains at National Metrology Institute of Japan (NMIJ). We have developed three atomic fountains: NMIJ-F1, NMIJ-F2, and a truncated atomic beam fountain. NMIJ-F1 has been the primary frequency standard with uncertainty of 4×10 -15 since 2004. Especially in the last 4 years, we have reported the data to Bureau International des Poids et Mes...
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We present a comprehensive study of the frequency shifts associated with the lattice potential in a Sr lattice clock by comparing two such clocks with a frequency stability reaching 5×10(-17) after a 1 h integration time. We put the first experimental upper bound on the multipolar M1 and E2 interactions, significantly smaller than the recently predicted theoretical upper limit, and give a 30-fo...
متن کاملAn Optical Lattice Clock with Spin-polarized 87Sr Atoms
We present a new evaluation of an Sr optical lattice clock using spin polarized atoms. The frequency of the 1S0 → 3P0 clock transition is found to be 429 228 004 229 873.6 Hz with a fractional accuracy of 2.6 × 10, a value that is comparable to the frequency difference between the various primary standards throughout the world. This measurement is in excellent agreement with a previous one of s...
متن کاملOptical frequency standards and clocks
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ژورنال
عنوان ژورنال: Metrologia
سال: 2021
ISSN: 0026-1394,1681-7575
DOI: 10.1088/1681-7575/abc104