On the non-linearity of the master equation describing spin-selective radical-ion-pair reactions

TL;DR

This paper discusses the physical interpretation of a recently derived non-linear master equation that models spin-selective radical-ion-pair reactions, emphasizing why such non-linearity is expected based on general principles.

Contribution

It clarifies the physical meaning of the non-linear master equation used in modeling radical-ion-pair reactions and argues that non-linearity naturally arises from fundamental considerations.

Findings

Non-linear master equation is physically meaningful

Non-linearity in the equation is expected from general arguments

Provides insight into spin-selective radical-ion-pair reactions

Abstract

We elaborate on the physical meaning of the non-linear master equation that was recently derived to account for spin-selective radical-ion-pair reactions. Based on quite general arguments, we show that such a non-linear master equation is indeed to be expected.