Quantum Darwinism in an Everyday Environment: Huge Redundancy in Scattered Photons

TL;DR

This paper demonstrates that in realistic environments like scattered photons from black body illumination, quantum Darwinism leads to rapid and extensive information proliferation, resulting in very high redundancies compared to idealized models.

Contribution

It provides the first detailed analysis of quantum Darwinism in an everyday environment, showing large redundancies in photon scattering scenarios.

Findings

Rapid information proliferation into the photon environment

Redundancies much larger than in idealized models

Effective recording of system states by scattered photons

Abstract

We study quantum Darwinism--the redundant recording of information about the preferred states of a decohering system by its environment--for an object illuminated by a black body. In the cases of point-source and isotropic illumination, we calculate the quantum mutual information between the object and its photon environment. We demonstrate that this realistic model exhibits fast and extensive proliferation of information about the object into the environment and results in redundancies orders of magnitude larger than the exactly soluble models considered to date.