Fast and Coherent Transfer of Atomic Qubits in Optical Tweezers using Fiber Array Architecture

Quantum Physics [Submitted on 9 Apr 2026] Fast and Coherent Transfer of Atomic Qubits in Optical Tweezers using Fiber Array Architecture Jia-Chao Wang, Zai-Zheng Zhang, Xiao Li, Guang-Wei Wang, Xiao-Dong He, Min Liu, Peng Xu Programmable neutral-atom arrays offer a promising route toward scalable quantum computing, where coherent qubit transfer enables non-local connectivity and reduces resource overhead. However, transfer speed and motional heating remain key bottlenecks for fast and deep quantum circuits. Here, we employ a fiber array neutral-atom quantum computing architecture with site-resolved control of trap depths to realize smooth amplitude exchange between static and moving traps, thereby enabling fast and coherent qubit transfer with ultralow motional heating. With a 10 \mus in situ transfer between static and moving traps, we obtain a per-cycle heating rate of 0.156(9) \muK, sustain over 500 cycles with negligible atom loss, and achieve a quantum state fidelity of 0.99992(5) per cycle. For inter-site transfer between two separated static traps, the operation takes 120 \mus with 0.783(17) \muK heating per transfer, and remains negligible atom loss for up to 100 repeated cycles with a fidelity of 0.9998(1) per transfer. Furthermore, through experimental studies of parallel transfer, we establish a model that elucidates the relationship between array inhomogeneity and the transfer heating rate. This fast, low-heating coherent transfer capability provides a practical route for improving both speed and fidelity in atom-shuttling based quantum computing. Comments: 10 pages, 7 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.07862 [quant-ph]   (or arXiv:2604.07862v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.07862 Focus to learn more Submission history From: Peng Xu [view email] [v1] Thu, 9 Apr 2026 06:23:47 UTC (4,633 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?)