Relaxation in quantum systems. Manifestation of the state-selective reactive decay

TL;DR

This paper investigates how state-selective reactive decay influences relaxation dynamics in quantum multistate systems, using the Bloch-Redfield approach to accurately model radical pair recombination kinetics.

Contribution

It demonstrates that the Bloch-Redfield approach can quantitatively describe key features of radical pair recombination, aligning with phenomenological and quantum measurement theories.

Findings

BRA accurately models radical pair recombination kinetics.

Quantum measurement theories align with BRA predictions.

Phenomenological models are supported by BRA results.

Abstract

The effect of state-selective reactive decay on the relaxation kinetics of quantum multistate systems is studied in detail in the Bloch-Redfield approach (BRA). The results are applied to the analysis of this effect in radical pair recombination kinetics. The BRA is shown to be able to describe quantitatively most important specific features of the recombination kinetics including those predicted by phenomenological treatment and by recently proposed approaches based on quantum measurement theories.