An important aspect for understanding the emergence of classical dynamics in a quantum mechanical framework
is to explain the origin of super-selection rules observed at macroscopic scales. Two specific cases will be
discussed, based on microscopically realistic master equations.
In the first part, I will show how the distinction and stability of chiral molecular configuration states can be
explained by decoherence. In the second part, the emergence and dynamics of motional pointer states will be
explored, by associating them with the solitonic solutions of a nonlinear equation related to a particular
stochastic unraveling of the appropriate master equation.