Fast and Coherent Transfer of Atomic Qubits in Optical Tweezers using Fiber Array Architecture
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arXiv
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| Format: | Preprint |
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2026
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| author | Wang, Jia-Chao Zhang, Zai-Zheng Li, Xiao Wang, Guang-Wei He, Xiao-Dong Liu, Min Xu, Peng |
| author_facet | Wang, Jia-Chao Zhang, Zai-Zheng Li, Xiao Wang, Guang-Wei He, Xiao-Dong Liu, Min Xu, Peng |
| contents | 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 $μ$s in situ transfer between static and moving traps, we obtain a per-cycle heating rate of 0.156(9) $μ$K, 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 $μ$s with 0.783(17) $μ$K 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07862 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Fast and Coherent Transfer of Atomic Qubits in Optical Tweezers using Fiber Array Architecture Wang, Jia-Chao Zhang, Zai-Zheng Li, Xiao Wang, Guang-Wei He, Xiao-Dong Liu, Min Xu, Peng Quantum Physics 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 $μ$s in situ transfer between static and moving traps, we obtain a per-cycle heating rate of 0.156(9) $μ$K, 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 $μ$s with 0.783(17) $μ$K 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. |
| title | Fast and Coherent Transfer of Atomic Qubits in Optical Tweezers using Fiber Array Architecture |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.07862 |