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Dynamic cancellation of ac Stark shift for pulsed EIT/Raman optical lattice clocks

T. Zanon-Willette·A. D. Ludlow·S. Blatt·M. M. Boyd·E. Arimondo·* Jun Ye
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Abstract

We propose a combination of Electromagnetically Induced Transparency (EIT)/Raman and pulsed spectroscopy techniques to accurately cancel frequency shifts arising from EIT fields in forbidden optical lattice clock transitions of alkaline earth atoms. Time-separated laser pulses are designed to trap atoms in coherent superpositions while eliminating off-resonance ac Stark contributions at particular laser detunings from the intermediate excited state. The scheme achieves efficient population transfer up to 60% with potential inaccuracy $<$ $10^{-17}$. Cancellation of external light shifts determined by a density matrix approach is confirmed by a complex wave-function formalism, sufficient at the mHz accuracy, under low field strengths or short interaction times.

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T. Zanon-Willette, A. D. Ludlow, S. Blatt, M. M. Boyd, E. Arimondo, * Jun Ye. 2006-10-13. Dynamic cancellation of ac Stark shift for pulsed EIT/Raman optical lattice clocks. https://doi.org/10.1103/physrevlett.97.233001

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