  This work investigates the influence of directional properties of decoherence
on kinetics rate equations. The physical reality is understood as a chain of
unitary and decoherence events. The former are quantum-deterministic, while the
latter introduce uncertainty and increase entropy. For interactions of matter
and antimatter, two approaches are considered: symmetric decoherence, which
corresponds to conventional symmetric (CP-invariant) thermodynamics, and
antisymmetric decoherence, which corresponds to antisymmetric (CPT-invariant)
thermodynamics. Radiation, in its interactions with matter and antimatter, is
shown to be decoherence-neutral. The symmetric and antisymmetric assumptions
result in different interactions of radiation with matter and antimatter. The
theoretical predictions for these differences are testable by comparing
absorption (emission) of light by thermodynamic systems made of matter and
antimatter. Canonical typicality for quantum mixtures is briefly discussed in
the Appendix.
