Programmable cavity-enhanced telecom quantum memory in thin-film lithium niobate
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866914567373717504 |
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| author | Yang, Chengdong Guo, Hanwen An, Yu-Yang He, Qian Lu, Chi Jiang, Ziheng Lu, Yan-Qing Zhu, Shining Ma, Xiao-Song |
| author_facet | Yang, Chengdong Guo, Hanwen An, Yu-Yang He, Qian Lu, Chi Jiang, Ziheng Lu, Yan-Qing Zhu, Shining Ma, Xiao-Song |
| contents | Spectrally multiplexed telecom quantum networks require quantum memories that combine efficient storage with programmable frequency addressing. An ideal integrated implementation should therefore unite a native telecom transition, efficient storage and fast on-chip spectral control. Here we demonstrate a cavity-enhanced quantum memory in an isotopically purified $^{167}\mathrm{Er}^{3+}$-doped thin-film lithium niobate microring resonator. Long-lived hyperfine shelving states support persistent, high-contrast atomic frequency comb preparation, with a single-component comb lifetime of $277.6 \pm 52.6$s. Together with cavity impedance matching, this yields an on-chip storage efficiency of $23.3 \pm 0.5\%$ for 100-ns storage. The intrinsic electro-optic response of lithium niobate enables frequency-selective storage and routing of retrieved photons at rates up to 20~MHz with inter-channel crosstalk below $10^{-4}$. We further store and retrieve time-energy-entangled telecom photons, violating an entanglement-witness bound by more than 11 standard deviations and thus verifying the quantum nature of the storage process. Our results establish erbium-doped thin-film lithium niobate as a programmable light--matter interface for spectrally multiplexed quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_14777 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Programmable cavity-enhanced telecom quantum memory in thin-film lithium niobate Yang, Chengdong Guo, Hanwen An, Yu-Yang He, Qian Lu, Chi Jiang, Ziheng Lu, Yan-Qing Zhu, Shining Ma, Xiao-Song Quantum Physics Optics Spectrally multiplexed telecom quantum networks require quantum memories that combine efficient storage with programmable frequency addressing. An ideal integrated implementation should therefore unite a native telecom transition, efficient storage and fast on-chip spectral control. Here we demonstrate a cavity-enhanced quantum memory in an isotopically purified $^{167}\mathrm{Er}^{3+}$-doped thin-film lithium niobate microring resonator. Long-lived hyperfine shelving states support persistent, high-contrast atomic frequency comb preparation, with a single-component comb lifetime of $277.6 \pm 52.6$s. Together with cavity impedance matching, this yields an on-chip storage efficiency of $23.3 \pm 0.5\%$ for 100-ns storage. The intrinsic electro-optic response of lithium niobate enables frequency-selective storage and routing of retrieved photons at rates up to 20~MHz with inter-channel crosstalk below $10^{-4}$. We further store and retrieve time-energy-entangled telecom photons, violating an entanglement-witness bound by more than 11 standard deviations and thus verifying the quantum nature of the storage process. Our results establish erbium-doped thin-film lithium niobate as a programmable light--matter interface for spectrally multiplexed quantum networks. |
| title | Programmable cavity-enhanced telecom quantum memory in thin-film lithium niobate |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2605.14777 |