Related Experiment Video
Updated: Jul 19, 2025

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
The impact of phonon-assisted tunneling on optical and quantum characteristics of a coupled two-quantum dot system
Santiago Echeverri-Arteaga1,2, Herbert Vinck-Posada1, Edgar A Gómez2
1Departamento de Física, Universidad Nacional de Colombia, 111321, Bogotá, Colombia.
Abstract:
This work investigates the impact of decoherence induced by pure dephasing and phonon-assisted tunneling mechanisms on the optical and quantum properties of two quantum dots. Special attention is given to the density matrix at steady state, and a detailed analysis of populations, coherences, optical transitions and the emission spectrum is performed. Additionally, we study the influence of both phonon-decoherence mechanisms on bipartite entanglement and the degree of mixedness of the system. In particular, our findings indicate that the phonon-assisted tunneling mechanism partially affects the coherences of the system and quantum properties when the imbalance of phonon absorption and emission is significant. Conversely, the pure dephasing mechanism does not affect the populations but strongly entangles the quantum dots and the reservoir, inducing maximally mixed states and significantly reducing the spectral splitting in the emission spectrum of the system.
Related Concept Videos
The Quantum-Mechanical Model of an Atom
The de Broglie Wavelength
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
Variables Affecting Phosphorescence and Fluorescence
NMR Spectroscopy: Spin–Spin Coupling
π Electron Effects on Chemical Shift: Overview

