科研之友
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摘要
A Zeeman-insensitive optical clock atomic transition is engineered when nuclear spins are dressed by a nonresonant radio-frequency field. For fermionic species as Sr-87, Yb-171, and Hg-199, particular ratios between the radio-frequency driving amplitude and frequency lead to %26quot;magic%26apos;%26apos; magnetic values where a net cancelation of the Zeeman clock shift and a complete reduction of first-order magnetic variations are produced within a relative uncertainty below the 10(-18) level. An Autler-Townes continued fraction describing a semiclassical radio-frequency dressed spin is numerically computed and compared to an analytical quantum description including higher-order magnetic field corrections to the dressed energies.
- 出版日期2012-11-30
