Contribution of negative-energy states to multipolar polarizabilities of the Sr optical lattice clock
arXiv (Cornell University)(2023)
摘要
We address the problem of lattice light shifts in the Sr clock caused by multipolar M1 and E2 atom-field interactions. We presented a simple but accurate formula for the magnetic-dipole polarizability that takes into account both the positive and negative energy states contributions. We calculated the contribution of negative energy states to the M1 polarizabilities of the clock 1S0 and 3P0 states at the magic frequency. Taking these contributions into account, we obtained good agreement with the experimental results, resolving the major discrepancy between the theory and the experiment
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关键词
multipolar polarizabilities,lattice,sr,optical,negative-energy
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