Testing quantum Darwinism dependence on observers' resources

TL;DR

This paper investigates how the emergence of classical objectivity in quantum systems depends on observers' resources, using a dispersively coupled qubit model and signal processing to analyze measurement effects.

Contribution

It introduces an experimentally relevant model to study the influence of measurement choices and resources on quantum Darwinism's classical emergence.

Findings

Correlations are crucial in the classical reconstruction process.

Measurement type significantly affects the emergence of classical objectivity.

Resource availability influences the classical picture in quantum systems.

Abstract

The emergence of an objective classical picture is the core question of quantum Darwinism. How does this reconstructed classical picture depends on the resources available to observers? In this Letter, we develop an experimentally relevant model of a qubit coupled dispersively to a transmission line and use time-frequency signal processing techniques to understand if and how the emergent classical picture is changed when we have the freedom to choose the fragment decomposition and the type of radiation sent to probe the system. We show the crucial role of correlations in the reconstruction procedure and point to the importance of studying the type of measurements that must be done to access an objective classical data.