Spin-boson models for quantum decoherence of electronic excitations of biomolecules and quantum dots in a solvent

TL;DR

This paper develops spin-boson models to theoretically analyze quantum decoherence of electronic excitations in biomolecules and quantum dots caused by interactions with surrounding polar solvents, impacting their quantum dynamics.

Contribution

It introduces a novel spin-boson modeling approach to describe decoherence effects on biomolecular and quantum dot excitations in solvent environments.

Findings

Quantum decoherence significantly affects exciton dynamics.

Spin-boson models effectively describe solvent-induced decoherence.

Implications for light-induced conformational changes and energy transfer.

Abstract

We give a theoretical treatment of the interaction of electronic excitations (excitons) in biomolecules and quantum dots with the surrounding polar solvent. Significant quantum decoherence occurs due to the interaction of the electric dipole moment of the solute with the fluctuating electric dipole moments of the individual molecules in the solvent. We introduce spin boson models which could be used to describe the effects of decoherence on the quantum dynamics of biomolecules which undergo light-induced conformational change and on biomolecules or quantum dots which are coupled by Forster resonant energy transfer.