Criticality-Enhanced Charging of Quantum Battery via Optimized Quantum Amplification

Criticality-Enhanced Charging of Quantum Battery via Optimized Quantum Amplification | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Criticality-Enhanced Charging of Quantum Battery via Optimized Quantum Amplification Jiawei Zhang, teng liu, Mingshen Li, Qing-Shou Tan, Mang Feng, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9367961/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Achieving rapid charging in quantum batteries requires the efficient harnessing of quantum resources, which is a task with great challenge experimentally. Here we propose and experimentally realize a quantum battery charging protocol that enables fast injection of substantial energy using a trapped-ion platform governed by the quantum Rabi model (QRM). The core of the protocol lies in the employment of the squeezing effect and the QRM criticality. Reinforcement learning further improves the charging performance by optimizing the preparation of the squeezed and anti-squeezed states and accelerating energy inflow near criticality. Experimental implementation with a single ${}^{171}\mathrm{Yb}^+$ ion demonstrates the feasibility of the protocol, where the vibrational mode (i.e., quantized phonons) acts as the quantum battery. We witness that both the maximally extractable work (i.e., ergotropy) and the charging power exhibit criticality-induced enhancement. This work provides a practical pathway toward criticality-enhanced quantum batteries, underscoring the potential of squeezing-mediated amplification and displacement-based energy storage in realistic quantum systems. Physical sciences/Energy science and technology/Energy storage/Batteries Physical sciences/Physics/Quantum physics/Quantum information Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementalMaterial.pdf Supplemental_Material Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9367961","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":626596771,"identity":"dacd833c-4f33-49c8-9c1a-77207a71e36d","order_by":0,"name":"Jiawei 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