Decoherence challenges in Nanoscience: A Quantum Phase Space perspective

Quantum Physics arXiv:2512.22297 (quant-ph) [Submitted on 25 Dec 2025] Title:Decoherence challenges in Nanoscience: A Quantum Phase Space perspective Authors:Angelo Mamitiana Ralaikoto, Diary Lova Ratsimbazafy, Ravo Tokiniaina Ranaivoson, Fanamby Sahondraniandriana, Roland Raboanary, Raoelina Andriambololona, Nomenjanahary Tanjonirina Manampisoa, Rivo Herivola Manjakamanana Ravelonjato View a PDF of the paper titled Decoherence challenges in Nanoscience: A Quantum Phase Space perspective, by Angelo Mamitiana Ralaikoto and 7 other authors View PDF HTML (experimental) Abstract:Quantum decoherence, the process by which a quantum system loses its coherence through interaction with an environment and becomes classical-like, represents both the fundamental mechanism for the quantum-to-classical transition and a major challenge to realizing scalable nanoscale quantum technologies. This work introduces a novel theoretical framework based on Quantum Phase Space (QPS) to address the dual challenge of characterizing environment-selected pointer states and modeling decoherence dynamics across different regimes. Within this framework, pointer states for particle motion are identified as the minimum-uncertainty states, those that saturate the quantum uncertainty relation, thereby constituting the closest quantum analogue to classical phase-space points. The structure of the QPS, encoded in a variance-covariance matrix, is shown to be directly shaped by environmental properties. A time-independent matrix corresponds to Markovian (memoryless) decoherence, described by constant diffusion and friction coefficients, while a time-dependent matrix captures non-Markovian dynamics, characterized by environmental memory and information backflow. This unified geometric formalism, applied to both Lindblad and Non-Markovian master equations, enables us to derive explicit relations between environmental parameters and phase-space structure, as demonstrated in a specific illustrative example. This approach has the potential to serve as a powerful tool for modeling decoherence in nanoscience and could inform new principles for designing mitigation strategies and harnessing non-Markovian effects for quantum technologies. The QPS framework may thus bridge fundamental theory and practical quantum engineering, offering a promising coherent pathway to understand, control, and exploit decoherence at the nanoscience frontier. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2512.22297 [quant-ph] (or arXiv:2512.22297v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2512.22297 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Ravo Tokiniaina Ranaivoson [view email] [v1] Thu, 25 Dec 2025 21:41:33 UTC (19 KB) Full-text links: Access Paper: View a PDF of the paper titled Decoherence challenges in Nanoscience: A Quantum Phase Space perspective, by Angelo Mamitiana Ralaikoto and 7 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2025-12 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) Links to Code Toggle Papers with Code (What is Papers with Code?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)