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| Hauptverfasser: | , , , , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2506.15399 |
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| _version_ | 1866911011873751040 |
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| author | Guo, Jinxian Wang, Meihong Wu, Zeliang Qiao, Chenyu Xu, Fengyi Zhang, Xiaoran Su, Xiaolong Chen, Liqing Zhang, Weiping |
| author_facet | Guo, Jinxian Wang, Meihong Wu, Zeliang Qiao, Chenyu Xu, Fengyi Zhang, Xiaoran Su, Xiaolong Chen, Liqing Zhang, Weiping |
| contents | In continuous-variable quantum information processing, it is crucial to develop high-efficiency and broadband quantum memory of squeezed light, which enables the storage of full-bandwidth information. Here, we present a quantum memory of squeezed light with up to 24 MHz bandwidth, which is at least 12 times that of previous narrowband resonant memory systems, via a far-off resonant Raman process. We achieve output squeezing of as high as 1.0 dB with fidelity above 92% and a memory efficiency of 80%, corresponding to an end-to-end efficiency of 64.2%, when input squeezing is 1.6 dB. The lowest excess noise of 0.025 shot-noise-unit in the memory system is estimated by the noisy channel model which is benefited from optimizing quantum memory performance with a backward retrieval strategy. Our results represent a breakthrough in high-performance memory for squeezed states within tens of MHz-level bandwidth, which has potential applications in high-speed quantum information processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_15399 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-Efficiency Quantum Memory of Full-Bandwidth Squeezed Light Guo, Jinxian Wang, Meihong Wu, Zeliang Qiao, Chenyu Xu, Fengyi Zhang, Xiaoran Su, Xiaolong Chen, Liqing Zhang, Weiping Quantum Physics In continuous-variable quantum information processing, it is crucial to develop high-efficiency and broadband quantum memory of squeezed light, which enables the storage of full-bandwidth information. Here, we present a quantum memory of squeezed light with up to 24 MHz bandwidth, which is at least 12 times that of previous narrowband resonant memory systems, via a far-off resonant Raman process. We achieve output squeezing of as high as 1.0 dB with fidelity above 92% and a memory efficiency of 80%, corresponding to an end-to-end efficiency of 64.2%, when input squeezing is 1.6 dB. The lowest excess noise of 0.025 shot-noise-unit in the memory system is estimated by the noisy channel model which is benefited from optimizing quantum memory performance with a backward retrieval strategy. Our results represent a breakthrough in high-performance memory for squeezed states within tens of MHz-level bandwidth, which has potential applications in high-speed quantum information processing. |
| title | High-Efficiency Quantum Memory of Full-Bandwidth Squeezed Light |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2506.15399 |