Fundamental decoherence from quantum spacetime

We show that quantum properties of spacetime, encoded by noncommutativity at the Planck scale, lead to a generalized time evolution of quantum systems in which pure states can evolve into mixed states. Specifically, a decoherence mechanism is obtained in the form of a Lindblad-like time evolution fo...

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Bibliographic Details
Main Authors Arzano, Michele, D'Esposito, Vittorio, Gubitosi, Giulia
Format Journal Article
LanguageEnglish
Published 30.08.2022
Subjects
Physics - General Relativity and Quantum Cosmology
Physics - High Energy Physics - Theory
Physics - Quantum Physics
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Summary:We show that quantum properties of spacetime, encoded by noncommutativity at the Planck scale, lead to a generalized time evolution of quantum systems in which pure states can evolve into mixed states. Specifically, a decoherence mechanism is obtained in the form of a Lindblad-like time evolution for the density operator when the action of time translations generator is deformed by the effects of spacetime noncommutativity. The decoherence time for the evolution of a free particle is used to show that the Planck mass is the maximum allowed mass for elementary quantum systems.
DOI:10.48550/arxiv.2208.14119