  The superposition of chiral states of chiral molecules, as delocalized
quantum states of a many-particle system, can be used for the experimental
investigations of decoherence theory. In this regard, a great challenge is the
precise quantification of the robustness of these superpositions against
environmental effects. The methods so far proposed need the detailed
specification of the internal states of the molecule, usually requiring heavy
numerical calculations. Here, by using the linearized quantum Boltzmann
equation and by borrowing ideas employed for analyzing other quantum systems,
we present a general and simple approach, of large applicability, which can be
used to compute the dominant contribution to the decoherence rate for the
superpositions of chiral states of chiral molecules, due to environmental
scattering.
