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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.16399 |
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| _version_ | 1866914088910585856 |
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| author | Shi, Jixuan Zhang, Sheng Wu, Yukai Sun, Yuedong Liang, Yibo Wang, Hai Pu, Yunfei Duan, Luming |
| author_facet | Shi, Jixuan Zhang, Sheng Wu, Yukai Sun, Yuedong Liang, Yibo Wang, Hai Pu, Yunfei Duan, Luming |
| contents | Efficient generation of large-scale multipartite entangled states is a critical but challenging task in quantum information processing. Although generation of multipartite entanglement within a small set of individual qubits has been demonstrated, further scale-up in system size requires the connection of smaller entangled states into a larger state in a scalable and modular manner. Here we achieve this goal by implementing memory-enhanced fusion of two multipartite entangled states via photonic interconnects. Through asynchronous preparation of two tripartite W-state entanglements in two spatially-separated modules of atomic quantum memories and on-demand fusion via single-photon interference, we demonstrate the creation of a four-partite W-state entanglement shared by two remote quantum memory modules in a heralded way. We further transfer the W state from the memory qubits to the photonic qubits, and confirm the genuine four-partite entanglement through witness measurements. We then demonstrate memory-enhanced scaling in efficiencies in the entanglement fusion. The demonstrated scalable generation and fusion of multipartite entangled states pave the way towards realization of large-scale distributed quantum information processing in the future. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_16399 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scalable and modular generation of multipartite entangled states through memory-enhanced fusion Shi, Jixuan Zhang, Sheng Wu, Yukai Sun, Yuedong Liang, Yibo Wang, Hai Pu, Yunfei Duan, Luming Quantum Physics Efficient generation of large-scale multipartite entangled states is a critical but challenging task in quantum information processing. Although generation of multipartite entanglement within a small set of individual qubits has been demonstrated, further scale-up in system size requires the connection of smaller entangled states into a larger state in a scalable and modular manner. Here we achieve this goal by implementing memory-enhanced fusion of two multipartite entangled states via photonic interconnects. Through asynchronous preparation of two tripartite W-state entanglements in two spatially-separated modules of atomic quantum memories and on-demand fusion via single-photon interference, we demonstrate the creation of a four-partite W-state entanglement shared by two remote quantum memory modules in a heralded way. We further transfer the W state from the memory qubits to the photonic qubits, and confirm the genuine four-partite entanglement through witness measurements. We then demonstrate memory-enhanced scaling in efficiencies in the entanglement fusion. The demonstrated scalable generation and fusion of multipartite entangled states pave the way towards realization of large-scale distributed quantum information processing in the future. |
| title | Scalable and modular generation of multipartite entangled states through memory-enhanced fusion |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.16399 |