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Open Quantum Systems Decoherence

Fixing semi-classical physics from first principles: how to derive effective classical-quantum dynamics from open quantum theory

arXiv

Authors: Isaac Layton

Year

2026

Paper ID

45399

Status

Preprint

Abstract Read

~2 min

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Abstract

Semi-classical approaches approximate fully quantum descriptions with partially classical ones. Here we use a toy model to highlight the failings of the standard mean-field semi-classical approach, and show how including environmental decoherence can lead to improved semi-classical theories that are exact descriptions of the original quantum dynamics. In doing so, we show how consistent models of classical-quantum dynamics can arise as effective descriptions of open quantum systems.

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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.
Semi-classical approaches approximate fully quantum descriptions with partially classical ones.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2604.08024 [2] arXiv https://arxiv.org/abs/2604.08024 [3] Publisher https://arxiv.org/abs/2604.08024

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