Symmetric states pulse laser preparation

It has been shown [31] that a system of two identical two-level atoms may be prepared in the symmetric state s) by a short laser pulse. The conditions for a selective excitation of the collective atomic states can be analyzed from the interaction Hamiltonian of the laser field with the two-atom system. We make the unitary transformation... 

Figure 1. Intramolecular vibrational density redistribution IVR of Na3

Figure 45. Schematic representation of the preparation and detection of rotational coherence in a molecule. The case depicted corresponds to the linearly polarized excitation (polarization vector ,) of a symmetric top molecule in ground-state ro-vibronic level S0v0 J0K0M0) to those rotational levels of the excited vibronic state 15,1 ,) allowed by the rotational selection rules germane to a parallel-type transition moment. The excitation process creates a superposition state of three rotational levels, the coherence properties of which can be probed by time resolving the polarized fluorescence (polarization it) to the manifold of ground-state ro-vibronic levels S0vf JfKfMfy, or by probing with a second, variably time-delayed laser pulse (polarization...

---