  In this work, we investigate the existence of transition state resonances on
atom-diatom reactive collisions from a time-dependent perspective, stressing
the role of quantum trajectories as a tool to analyze this phenomenon. As it is
shown, when one focusses on the quantum probability current density, new
dynamical information about the reactive process can be extracted. In order to
detect the effects of the different rotational populations and their
dynamics/coherences, we have considered a reduced two-dimensional dynamics
obtained from the evolution of a full three-dimensional quantum time-dependent
wave packet associated with a particular angle. This reduction procedure
provides us with information about the entanglement between the radial degrees
of freedom (r,R) and the angular one (\gamma), which can be considered as
describing an environment. The combined approach here proposed has been applied
to study the F+HD reaction, for which the FH+D product channel exhibits a
resonance-mediated dynamics.
