# Kinetics of interactions of matter, antimatter and radiation consistent with antisymmetric (CPT-invariant) thermodynamics

## TL;DR

This paper explores how directional decoherence influences matter-antimatter interactions within CPT-invariant thermodynamics, predicting testable differences in radiation absorption and emission.

## Contribution

It introduces the concept of antisymmetric (CPT-invariant) thermodynamics and analyzes its impact on matter-antimatter radiation interactions, contrasting it with conventional symmetric thermodynamics.

## Key findings

- Radiation interactions are decoherence-neutral.
- Different matter-antimatter interactions predicted under symmetric and antisymmetric assumptions.
- Testable differences in light absorption/emission by matter and antimatter systems.

## Abstract

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.