Figure 2: Population dynamics of Bixon-Jortner model. The dark gray, light gray, and white areas correspond to the population of , , and , respectively. The hatched area denoted by IVR corresponds to the population distributed over background manifolds . (a) is taken to be the initial state. (b) Two CW-lasers, and , are applied corresponding to the - and - transitions. Both and are taken to be . (c) Intense CW-laser is introduced to make the helper state strongly coupled with together with the relatively weak lasers and .