Modeling Energy Relaxation via Quantum Thermalization: A Superconducting Qubit Coupled to a Many-Body TLS System
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Quantum Physics arXiv:2603.13322 (quant-ph) [Submitted on 4 Mar 2026] Title:Modeling Energy Relaxation via Quantum Thermalization: A Superconducting Qubit Coupled to a Many-Body TLS System Authors:Xue-Yi Guo View a PDF of the paper titled Modeling Energy Relaxation via Quantum Thermalization: A Superconducting Qubit Coupled to a Many-Body TLS System, by Xue-Yi Guo View PDF HTML (experimental) Abstract:While two-level systems (TLS) in superconducting qubits are known to introduce phonon-mediated energy dissipation channels, many-body TLS systems themselves can also act as a distinct dissipation channel whose effect on qubit energy relaxation remains to be explored. In this work, we model and numerically simulate the irreversible thermalization-driven energy relaxation of a superconducting qubit coupled to a many-body TLS system. Our numerical results show that thermalization suppresses coherent energy exchange between the qubit and TLS, resulting in exponential energy decay. The relaxation times scale as $T_1, T_2 \propto J^{-2}$, where $J$ denotes the qubit-TLS coupling strength. Moreover, $T_1$ is significantly affected by the internal coupling strength of the TLS system, the TLS frequency fluctuation rate, and the number of thermally excited TLS. This work provides a quantum thermalization perspective for understanding qubit energy relaxation and decoherence, with potential implications for decoherence scenarios in other open quantum systems. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.13322 [quant-ph] (or arXiv:2603.13322v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.13322 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Xue-Yi Guo [view email] [v1] Wed, 4 Mar 2026 16:26:19 UTC (971 KB) Full-text links: Access Paper: View a PDF of the paper titled Modeling Energy Relaxation via Quantum Thermalization: A Superconducting Qubit Coupled to a Many-Body TLS System, by Xue-Yi GuoView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-03 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?)