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Related Experiment Video

Updated: Oct 12, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Many-Body Localization and the Emergence of Quantum Darwinism.

Nicolás Mirkin¹, Diego A Wisniacki¹

¹Departamento de Física "J. J. Giambiagi" and IFIBA, FCEyN, Universidad de Buenos Aires, Buenos Aires 1428, Argentina.

Entropy (Basel, Switzerland)

|November 27, 2021

Summary

Disorder in quantum systems enhances Quantum Darwinism (QD), enabling observers to agree on system states. A disordered environment improves objectivity, crucial for understanding quantum information in large systems.

Keywords:

Quantum Darwinism decoherence disorder many-body localization

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Last Updated: Oct 12, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Area of Science:

Quantum physics
Quantum information theory

Background:

Quantum Darwinism (QD) explains how objective classical information emerges from quantum systems via environmental interactions.
Decoherence in quantum systems leads to information proliferation in the environment, allowing for consensus among observers.

Purpose of the Study:

To investigate the impact of environmental disorder on the emergence and effectiveness of Quantum Darwinism.
To quantify the relationship between disorder, objectivity, and environmental properties.

Main Methods:

Introduction of a 'lack of redundancy' measure to quantify objectivity.
Analogy drawn between this measure and entanglement entropy (EE) of environmental eigenstates.
Estimation of the many-body mobility edge using the Darwinistic measure.

Main Results:

Highly disordered environments are found to be significantly beneficial for Quantum Darwinism.
Objectivity shows a critical dependence on environmental size beyond a certain disorder level.
Disorder can mitigate the loss of redundancy caused by intra-environment interactions.

Conclusions:

Environmental disorder plays a critical role in establishing objective quantum information, especially in thermodynamically sized environments.
The study provides a method to estimate the many-body mobility edge through QD metrics.
Disordered quantum evolution offers a potential pathway to preserve information redundancy.