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Open Quantum Systems Decoherence

Toy Model Challenging Prevailing Definitions of Classicality

arXiv
Authors: Irene Valladares Duque, Philipp Strasberg

Year

2024

Paper ID

6119

Status

Preprint

Abstract Read

~2 min

Abstract Words

93

Citations

N/A

Abstract

We analyze a toy model that obeys environmentally induced decoherence and quantum Darwinism and satisfies the decoherent histories criterion and Leggett-Garg inequalities with respect to the pointer basis. Yet, the resulting "classical" dynamics are extremely fragile and recohere after a seemingly innocent control operation. This challenges the idea that classical behaviour or the Multiverse branches can be identified by looking at the universal wave function alone. It also demonstrates that quantum Darwinism is compatible with strong non-Markovianity. Possible solutions related to Markovianity, non-integrability and an operational definition of pointer states are briefly discussed.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • We analyze a toy model that obeys environmentally induced decoherence and quantum Darwinism and satisfies the decoherent histories criterion and Leggett-Garg inequalities with...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2412.08444 [2] arXiv https://arxiv.org/abs/2412.08444 [3] Publisher https://arxiv.org/abs/2412.08444

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