Four-state N-atom as a simple theoretical model for electromagnetically induced absorption

Details Four-state N-atom as a simple theoretical model for electromagnetically induced absorption Four-state N-atom as a simple theoretical model for electromagnetically induced absorption

1999-04-16

arxiv.org/abs/physics/9904033v1

Physics

Atomic Physics

RevTeX 4 pages, 3 ps figures

Scientific paper

A simple theoretical model describing the positive sign of subnatural-width absorption resonances in the recent experiment of Akulshin and co-workers (Phys. Rev. A, {\bf 57}, 2996 (1998)) is proposed. An analytical expression for the linear response to the weak probe field is found in the low-saturation limit with respect to the control field. It is shown that the positive sign of subnatural resonance is caused by the spontaneous transfer of the light-induced coherence from the excited level to the ground one.

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