Quasi-Classical Spin-Boson Models

TL;DR

This paper explores Spin-Boson models in the quasi-classical limit, where the environment becomes classical and influences quantum particles through an effective dynamics, bridging quantum and classical descriptions.

Contribution

It introduces a quasi-classical framework for Spin-Boson models, deriving effective dynamics of particles driven by a classical environment.

Findings

Field becomes macroscopic in the quasi-classical limit

Particles remain quantum while the environment becomes classical

Explicit effective dynamics derived for the particle system

Abstract

In this short note we study Spin-Boson Models from the Quasi-Classical standpoint. In the Quasi-Classical limit, the field becomes macroscopic while the particles it interacts with, they remain quantum. As a result, the field becomes a classical environment that drives the particle system with an explicit effective dynamics.