Wigner distribution and Boltzmann-Shannon entropy for a diatomic molecule under polarized electric field interaction

Abstract

We study the classical chaos appearing in a diatomic molecules $BeO$, $CO$ and $CN$ due to the interaction with a circularly polarized electric field, and its signature in Quantum Mechanics through the Wigner distribution function and the Boltzmann-Shannon entropy. We found a motion out of the center of the quantum phase space defined by Wigner function when the classical system becomes chaotic, and we found a jumping behavior of the average Boltzmann-Shannon entropy with respect the electric field strength when the classical system becomes chaotic, indicating a sudden increasing in the disorder (or sudden lost of information) in the quantum system.

8 figures, presented at LXI Congreso Nacional de Física, Octubre 2018, México. presente at the WCANE-2019 Congress at Paris, 2019. Submitted at PRA, 2019