Abstract

A well-known property of the two-level systems interacting with a resonantpulse is that they undergo complete population inversion (CPI) when the pulse area is equal to an odd integer of ½π. In contrast, in the case of pulses of nonzeroconstant detuning studied so far, the level populations can never be completely inverted, i.e., the population of the upper state is always less than one. Here we show that this limitation is removed in the case of a two-level system interacting with a setof consecutive pulses. For simplicity, we consider the case of identical Rosen-Zener pulses $\Omega (t)=\alpha /\cosh (\beta t)$with nonzero constant detuning δ.^1-4

© 1994 IEEE