Coherent transients mimicked by two-photon coherent control of a   three-level system
  We show that two-photon coherent control in a $V$-shape three-level system projects one-photon coherent transient in a simple two-level system. Higher order chirps of a shaped laser pulse play the roles of time and linear chirp in conventional coherent transients. In a devised scheme of a three-pulse coherent excitation experiment, the phase and amplitude of controlled transition probability is retrieved from a 2D Fourier-transform spectral peak. 
Jongseok Lim, Jae-uk Kim, Sangkyung Lee, and Jaewook Ahn
physics.optics