Low temperature decoherence dynamics in molecular spin systems using the Lindblad master equation

TL;DR

This paper develops a theoretical framework combining open quantum systems and electronic structure theory to predict low-temperature decoherence dynamics in molecular spin systems, aiding quantum technology development.

Contribution

It introduces a novel approach integrating the Lindblad master equation with electronic structure data to model spin relaxation in molecular ensembles.

Findings

Predicts relaxation rate trends in molecular spin systems.

Provides a versatile framework for various quantum technology applications.

Explicitly includes electronic structure in decoherence modeling.

Abstract

Understanding the spin dynamics in low-temperature settings is crucial to designing and optimizing molecular spin systems for use in emerging quantum technologies. At low temperatures, irreversible loss occurs due to ensemble dynamics facilitated by electronic-nuclear spin interactions. We develop a combined open quantum systems and electronic structure theory capable of predicting trends in relaxation rates in molecular spin ensembles. We use the Gorini-Kossakowski-Sudarshan-Lindblad master equation and explicitly include electronic structure information in the decoherence channels. We apply this theory to several molecular systems pertinent to contemporary quantum technologies. Our theory provides a framework to describe irreversible relaxation effects in molecular spin systems with applications in quantum information science, quantum sensing, molecular spintronics, and other spin systems dominated by spin-spin relaxation.