Charging efficiency bursts in a quantum battery with cyclic indefinite causal order

Quantum Physics [Submitted on 24 Mar 2026] Charging efficiency bursts in a quantum battery with cyclic indefinite causal order Po-Rong Lai, Hsien-Chao Jan, Jhen-Dong Lin, Yueh-Nan Chen Enhancement of quantum battery performance is a popular subject in quantum thermodynamics. An interesting phenomenon is the quick charging effect [Phys. Rev. Res. 6, 023136 (2024)], which has been explored by utilizing a quantum interferometric technique known as superposition of trajectories. A similar technique used to boost quantum battery performance is indefinite causal order. Here, we propose a new charging protocol that utilizes cyclic indefinite causal order, whereby N charging sequences are superposed when utilizing N chargers. We observe charging efficiency bursts when implementing our cyclic indefinite charging protocol. The duration of these bursts increase with N. Additionally, we present a circuit model to implement our charging protocol for the two-charger scenario and perform proof-of-concept demonstrations on IonQ, Quantinuum and IBMQ quantum processors. The results validate the existence of charging efficiency bursts as shown by our theoretical analysis and numerical simulations. Comments: 10 pages, 5 figures, 3 tables Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.22761 [quant-ph]   (or arXiv:2603.22761v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2603.22761 Focus to learn more Submission history From: Po-Rong Lai [view email] [v1] Tue, 24 Mar 2026 03:44:55 UTC (2,404 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-03 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?)