Resolution:
## Figure 3.
The time evolution of the inversion S_{3}(t) for a sin-squared pulse. The excitation is on-resonance, i.e., ω = ω_{10}, the pulse area is θ = Π, and φ= 0. (a) n_{p}= 10, (b) n_{p}= 3, (c) n_{p}= 2, and (d) n_{p}= 1. Solid curve: N = 10^{9}cm^{−2}, dotted curve: N = 3 × 10^{11}cm^{−2}, dashed curve: N = 5 × 10^{11}cm^{−2}, and dot-dashed curve: N = 7 × 10^{11}cm^{−2}.
Paspalakis and Boviatsis |