Two Doppler-free multiphoton schemes achieve microsecond coherent control of the 88Sr 1S0–3P0 clock transition on 3e6 free-space thermal atoms, suppressing Doppler dephasing 1000-fold versus single-photon excitation.
For aπ/2-pulse,T π/2 1 =π/(2Ω 1) and we obtain Ugs+(T π/2 1 )≈ eiδ1T π/2 1 /2 √ 2 1−iδ 1/Ω1 −i −i1 +iδ 1/Ω1
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Microsecond-Scale Coherent Control of a Forbidden Clock Transition with Doppler-Free Multiphoton Excitations
Two Doppler-free multiphoton schemes achieve microsecond coherent control of the 88Sr 1S0–3P0 clock transition on 3e6 free-space thermal atoms, suppressing Doppler dephasing 1000-fold versus single-photon excitation.