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

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

2006-10-13

arxiv.org/abs/physics/0610098v2

Phys. Rev. Lett. 97, 233001 (2006)

Physics

Atomic Physics

submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.233001

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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