Magic intensity trapping of the Mg lattice clock with light shift suppressed below $10^{-19}$
| Autor: | Ting-Yun Shi, Fang-Fei Wu, Yong-Bo Tang, Li-Yan Tang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Optical lattice Photon Atomic Physics (physics.atom-ph) FOS: Physical sciences Configuration interaction Polarization (waves) 01 natural sciences Physics - Atomic Physics 010305 fluids & plasmas Light Shift Lattice (order) 0103 physical sciences Black-body radiation Laser detuning Physics::Atomic Physics Atomic physics 010306 general physics |
| DOI: | 10.48550/arxiv.1909.07692 |
| Popis: | Progress in atomic optical clocks with total uncertainty of $10^{-18}$ or below requires a precise estimation of multipolar and higher-order effects due to atom-field interactions. Magnesium is an attractive candidate for optical lattice clocks because it is insensitive to blackbody radiation and has a large quality factor. We employ a combined method of the Dirac-Fock plus core polarization and the relativistic configuration interaction to calculate the dynamic multipolar polarizabilities and the hyperpolarizabilities of the atomic Mg clock. The lattice light shift against variation of the laser detuning and trap depth is also investigated. We find that there exists a distinctive operational magic lattice intensity of $5.33(2)E_R$ ($E_R$ is the lattice photon recoil energy) that reduces the total light shift below $1\times 10^{-19}$ over 14\% of the trap depth variation, which will pave the way for the development of a new time-frequency standard of the Mg lattice clock. Comment: 6 pages, 1 figures |
| Databáze: | OpenAIRE |
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