Quantum decoherence in a hybrid atom-optical system of a one-dimensional coupled-resonator waveguide and an atom

TL;DR

This paper investigates quantum decoherence in a hybrid atom-optical system comprising a one-dimensional coupled-resonator waveguide with a two-level atom, analyzing how environmental interactions affect quantum coherence and excitation lifetime.

Contribution

It introduces a model for decoherence in a hybrid atom-optical system and calculates the excitation lifetime using eigenstates, highlighting the quantum coherence properties.

Findings

Decoherence reduces the lifetime of excitations in the hybrid system.

Eigenstates reveal the dressed state structure of the system.

Quantum coherence is characterized by the excitation lifetime.

Abstract

Decoherence for a one-dimensional coupled-resonator waveguide with a two-level system inside one of resonators, induced by their interaction with corresponding environments, is investigated. Each environment is modeled as a continuum of harmonic oscillators. By finding the eigenstates of the hybrid system, which is the dressed state of the hybrid system, we calculate the lifetime of one excitation, which characterizes the existence of quantum coherence in such hybrid system and the basic quantum nature.