Rovibrational laser control targeting a dark state in acetylene. Simulation in the Ns = 1, Nr = 5 polyad |
| |
Authors: | L Santos M Herman M Desouter-Lecomte |
| |
Institution: | 1. Service de Chimie quantique et Photophysique, Université libre de Bruxelles, Brussels, Belgium;2. Laboratoire de Chimie Physique, Université Paris-sud, Orsay, France;3. Département de Chimie, Université de Liége, Liége, Belgium |
| |
Abstract: | Optimal control theory in the Liouville space is used to perform rovibrational control by means of a laser pulse in a polyad of acetylene in order to populate a dark vibrational state. The initial mixed state is a truncated Boltzmann distribution of rotational levels from J=27 to J=31 of the ground vibrational state. The target state is a rotational equidistribution of levels ranging from J=28 to J=32 of the first excited vibrational dark state including quanta of energy in each bending modes, with positive vibrational angular momenta. The simulation is performed by using a manifold of eigenstates of a full-dimensional Hamiltonian calibrated by high precision spectroscopy known as the global acetylene Hamiltonian B. Amyay et al., J. Chem. Phys. 131, 114301 (2009)]. The control is successful as an Uhlmann's fidelity of 0.98 is reached. |
| |
Keywords: | Acetylene polyad optimal control rovibrational Liouville space |
|
|