Detuning-Controlled Phase Transition from Passive to Active Regimes in Non-Markovian Quantum Batteries

Quantum Physics [Submitted on 10 Apr 2026] Detuning-Controlled Phase Transition from Passive to Active Regimes in Non-Markovian Quantum Batteries Meysam Helmi Barati Farimani, Ali Mortezapour We investigate a two-qubit quantum battery where coherent charger-battery coupling competes with non-Markovian environmental interactions. By tuning the coupling strengths and detuning, we identify regimes in which environmental memory enhances energy storage and charging power, while strong dissipation suppresses ergotropy by driving the battery into passive states. We show that detuning plays a dual role: reducing dissipation and inducing a phase shift in the memory kernel that controls the interference between coherent energy exchange and environment-induced backflow. As a result, although the stored energy varies smoothly, the extractable work exhibits a discontinuous onset at a critical detuning, signaling a first-order phase transition in ergotropy. The corresponding phase diagram in the coupling-detuning plane reveals a sharp boundary between thermodynamically inactive and work-producing regimes. Our results demonstrate that phase-controlled coherence and non-Markovianity provide a powerful mechanism for optimizing work extraction in open quantum batteries, offering practical strategies for noise-resilient quantum energy storage. Comments: 25 pages, 11 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.09888 [quant-ph]   (or arXiv:2604.09888v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.09888 Focus to learn more Submission history From: Ali Mortezapour [view email] [v1] Fri, 10 Apr 2026 20:31:40 UTC (1,033 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation 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 Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)