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Open Quantum Systems Decoherence

Quantum Dynamical Entropy and Dissipative Information Flows

arXiv
Authors: Giovanni Nichele, Fabio Benatti

Year

2026

Paper ID

30830

Status

Preprint

Abstract Read

~2 min

Abstract Words

115

Citations

N/A

Abstract

The Alicki-Lindblad-Fannes dynamical (ALF) entropy measures the rate at which new information is gathered about a quantum system by inspecting its long-time evolution. We propose an extension of the ALF entropy to open quantum dynamics as a measure of back-flow of information from the environment. Such a proposal is stronger than the existing ones based only on the open system reduced dynamics. In the case of a qubit collisionally coupled to a classical spin chain, we obtain an exact expression for the textit{open-system ALF entropy} explicitly depending on the environment correlations. An extreme case shows how the information flow from environment to system corresponds to vanishing entropy production as for reversible finite quantum systems.

Why This Paper Matters

  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
  • It adds a 2026 reference point for readers tracking recent quantum research.
  • The Alicki-Lindblad-Fannes dynamical (ALF) entropy measures the rate at which new information is gathered about a quantum system by inspecting its long-time evolution.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2603.14025 [2] arXiv https://arxiv.org/abs/2603.14025 [3] Publisher https://arxiv.org/abs/2603.14025

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