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- W4361219492 abstract "The energy levels and electric dipole ($E1$) matrix elements of the ground state and low-lying excited states of Be atoms are calculated using the relativistic configuration interaction plus core polarization (RCICP) method. The static and dynamic $E1$, magnetic dipole ($M1$) and electric quadrupole ($E2$) polarizabilities as well as the hyperpolarizabilities of the $2s^2~^1S_0$ and $2s2p~^3P_0$ states are determined. Two magic wavelengths, 300.03 and 252.28 nm, of $2s^2~^1S_0 rightarrow 2s2p~^3P_0$ clock transition are found. Then, the multipolar and nonlinear Stark shifts of the clock transition at the magic wavelength are discussed in detail. We find that when the laser intensity $I$ is in the range of 14.3 $sim$ 15.9 kW/cm$^{2}$ and the detuning $delta$ (the frequency detuning of the lattice laser frequency relative to the magic frequency) is in the range of 40.7 $sim$ 40.9 MHz, the fractional Stark shifts of the clock transition are less than 1.0 $times$ 10$^{-18}$. While, when $I$ is in the range of 15.01 $sim$ 15.46 kW/cm$^{2}$ and $delta$ is in the range of 40.73 $sim$ 40.76 MHz, the fractional Stark shifts are lower than 1.0 $times$ 10$^{-19}$." @default.
- W4361219492 created "2023-03-31" @default.
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- W4361219492 date "2023-03-28" @default.
- W4361219492 modified "2023-10-11" @default.
- W4361219492 title "Be optical lattice clocks with the fractional Stark shift up to the level of 10−19" @default.
- W4361219492 doi "https://doi.org/10.1088/1367-2630/acc81e" @default.
- W4361219492 hasPublicationYear "2023" @default.
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