Heterogeneous entanglement between a trapped ion and a solid-state quantum memory
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| _version_ | 1866910043357577216 |
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| author | Wang, Chen-Xu Wang, Yi-Yang Zhu, Tian-Xiang Yao, Qing-Quan Liang, Peng-Jun Li, Yuan-Cong Liu, Zi-Peng He, Ran Han, Yong-Jian Cui, Jin-Ming Zhou, Zong-Quan Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can |
| author_facet | Wang, Chen-Xu Wang, Yi-Yang Zhu, Tian-Xiang Yao, Qing-Quan Liang, Peng-Jun Li, Yuan-Cong Liu, Zi-Peng He, Ran Han, Yong-Jian Cui, Jin-Ming Zhou, Zong-Quan Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can |
| contents | Hybrid quantum networks offer a promising architecture for scalable quantum information processing and a future quantum internet, as they can combine the complementary strengths of disparate physical platforms. While single-atom systems provide deterministic quantum logic gates, atomic ensembles enable large-capacity quantum storage. However, generating entanglement between such heterogeneous systems has remained an open challenge, primarily due to fundamental spectral mismatches and system complexity. Here, we demonstrate a hybrid quantum network that entangles a single trapped $\mathrm{^{171}Yb^{+}}$ ion and a quantum memory based on $\rm ^{153}Eu^{3+}\colon\!Y_2SiO_5$ crystal over a 75-m separation. Using polarization-maintaining quantum frequency conversion, we map spin-photon entanglement onto a hybrid entanglement between a single spin qubit and a collective excitation of the quantum memory. The resulting entangled state achieves a fidelity of $(89.21 \pm 2.23)\%$ and violates the CHSH-Bell inequality by 6 standard deviations ($S = 2.328 \pm 0.055$), confirming nonlocality between two heterogeneous nodes. This work establishes entanglement between a quantum processing module with a multiplexed quantum memory node, representing a key step toward a scalable, multifunctional quantum internet. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_05836 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Heterogeneous entanglement between a trapped ion and a solid-state quantum memory Wang, Chen-Xu Wang, Yi-Yang Zhu, Tian-Xiang Yao, Qing-Quan Liang, Peng-Jun Li, Yuan-Cong Liu, Zi-Peng He, Ran Han, Yong-Jian Cui, Jin-Ming Zhou, Zong-Quan Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can Quantum Physics Atomic Physics Hybrid quantum networks offer a promising architecture for scalable quantum information processing and a future quantum internet, as they can combine the complementary strengths of disparate physical platforms. While single-atom systems provide deterministic quantum logic gates, atomic ensembles enable large-capacity quantum storage. However, generating entanglement between such heterogeneous systems has remained an open challenge, primarily due to fundamental spectral mismatches and system complexity. Here, we demonstrate a hybrid quantum network that entangles a single trapped $\mathrm{^{171}Yb^{+}}$ ion and a quantum memory based on $\rm ^{153}Eu^{3+}\colon\!Y_2SiO_5$ crystal over a 75-m separation. Using polarization-maintaining quantum frequency conversion, we map spin-photon entanglement onto a hybrid entanglement between a single spin qubit and a collective excitation of the quantum memory. The resulting entangled state achieves a fidelity of $(89.21 \pm 2.23)\%$ and violates the CHSH-Bell inequality by 6 standard deviations ($S = 2.328 \pm 0.055$), confirming nonlocality between two heterogeneous nodes. This work establishes entanglement between a quantum processing module with a multiplexed quantum memory node, representing a key step toward a scalable, multifunctional quantum internet. |
| title | Heterogeneous entanglement between a trapped ion and a solid-state quantum memory |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2603.05836 |