Quantum storage of entangled photons at telecom wavelengths in a crystal
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
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2022
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| _version_ | 1866916208825073664 |
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| author | Jiang, Ming-Hao Xue, Wenyi He, Qian An, Yu-Yang Zheng, Xiaodong Xu, Wen-Jie Xie, Yu-Bo Lu, Yanqing Zhu, Shining Ma, Xiao-Song |
| author_facet | Jiang, Ming-Hao Xue, Wenyi He, Qian An, Yu-Yang Zheng, Xiaodong Xu, Wen-Jie Xie, Yu-Bo Lu, Yanqing Zhu, Shining Ma, Xiao-Song |
| contents | The quantum internet -- in synergy with the internet that we use today -- promises an enabling platform for next-generation information processing, including exponentially speed-up distributed computation, secure communication, and high-precision metrology. The key ingredients for realizing such a global network are the distribution and storage of quantum entanglement. As ground-based quantum networks are likely to be based on existing fiber networks, telecom-wavelength entangled photons and corresponding quantum memories are of central interest. Recently, $\rm^{167}Er^{3+}$ ions have been identified as a promising candidate for an efficient, broadband quantum memory at telecom wavelength. However, to date, no storage of entangled photons, the crucial step of quantum memory using these promising ions, $\rm^{167}Er^{3+}$, has been reported. Here, we demonstrate the storage and recall of the entangled state of two telecom photons generated from an integrated photonic chip based on a silicon nitride micro-ring resonator. Combining the natural narrow linewidth of the entangled photons and long storage time of $\rm^{167}Er^{3+}$ ions, we achieve storage time of 1.936 $μ$s, more than 387 times longer than in previous works. Successful storage of entanglement in the crystal is certified by a violation of an entanglement witness with more than 23 standard deviations (-0.234 $\pm$ 0.010) at 1.936 $μ$s storage time. These results pave the way for realizing quantum networks based on solid-state devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_12898 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Quantum storage of entangled photons at telecom wavelengths in a crystal Jiang, Ming-Hao Xue, Wenyi He, Qian An, Yu-Yang Zheng, Xiaodong Xu, Wen-Jie Xie, Yu-Bo Lu, Yanqing Zhu, Shining Ma, Xiao-Song Quantum Physics Optics The quantum internet -- in synergy with the internet that we use today -- promises an enabling platform for next-generation information processing, including exponentially speed-up distributed computation, secure communication, and high-precision metrology. The key ingredients for realizing such a global network are the distribution and storage of quantum entanglement. As ground-based quantum networks are likely to be based on existing fiber networks, telecom-wavelength entangled photons and corresponding quantum memories are of central interest. Recently, $\rm^{167}Er^{3+}$ ions have been identified as a promising candidate for an efficient, broadband quantum memory at telecom wavelength. However, to date, no storage of entangled photons, the crucial step of quantum memory using these promising ions, $\rm^{167}Er^{3+}$, has been reported. Here, we demonstrate the storage and recall of the entangled state of two telecom photons generated from an integrated photonic chip based on a silicon nitride micro-ring resonator. Combining the natural narrow linewidth of the entangled photons and long storage time of $\rm^{167}Er^{3+}$ ions, we achieve storage time of 1.936 $μ$s, more than 387 times longer than in previous works. Successful storage of entanglement in the crystal is certified by a violation of an entanglement witness with more than 23 standard deviations (-0.234 $\pm$ 0.010) at 1.936 $μ$s storage time. These results pave the way for realizing quantum networks based on solid-state devices. |
| title | Quantum storage of entangled photons at telecom wavelengths in a crystal |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2212.12898 |