Non-Markovianity hinders Quantum Darwinism

TL;DR

This paper explores how non-Markovian effects, characterized by environmental memory, impede the emergence of classical reality from quantum systems, challenging the assumptions of Quantum Darwinism.

Contribution

It demonstrates that environmental memory effects hinder Quantum Darwinism and proposes a link to the lack of a measurement interpretation in non-Markovian regimes.

Findings

Non-Markovianity reduces the emergence of classical objectivity.

Memory effects in the environment hinder information proliferation.

Absence of measurement scheme interpretation in non-Markovian dynamics.

Abstract

In this Letter we investigate Quantum Darwinism and the emergence of a classical world from the quantum one in connection with the spectral properties of the environment. We use a microscopic model of quantum environment in which, by changing a simple system parameter, we can modify the information back flow from environment into the system, and therefore its non-Markovian character. We show that the presence of memory effects hinders the emergence of classical objective reality. We conjecture that this phenomenon is connected to the absence of a measurement-scheme interpretation for quantum trajectories in the non-Markovian regime.