Entanglement Distribution in Quantum Repeater with Purification and Optimized Buffer Time
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866909684597784576 |
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| author | Zang, Allen Chen, Xinan Kolar, Alexander Chung, Joaquin Suchara, Martin Zhong, Tian Kettimuthu, Rajkumar |
| author_facet | Zang, Allen Chen, Xinan Kolar, Alexander Chung, Joaquin Suchara, Martin Zhong, Tian Kettimuthu, Rajkumar |
| contents | Quantum repeater networks that allow long-distance entanglement distribution will be the backbone of distributed quantum information processing. In this paper we explore entanglement distribution using quantum repeaters with optimized buffer time, equipped with noisy quantum memories and performing imperfect entanglement purification and swapping. We observe that increasing the number of memories on end nodes leads to a higher entanglement distribution rate per memory and higher probability of high-fidelity entanglement distribution, at least for the case with perfect operations. When imperfect operations are considered, however, we make the surprising observation that the per-memory entanglement rate decreases with increasing number of memories. Our results suggest that building quantum repeaters that perform well under realistic conditions requires careful modeling and design that takes into consideration the operations and resources that are finite and imperfect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_14573 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Entanglement Distribution in Quantum Repeater with Purification and Optimized Buffer Time Zang, Allen Chen, Xinan Kolar, Alexander Chung, Joaquin Suchara, Martin Zhong, Tian Kettimuthu, Rajkumar Quantum Physics Quantum repeater networks that allow long-distance entanglement distribution will be the backbone of distributed quantum information processing. In this paper we explore entanglement distribution using quantum repeaters with optimized buffer time, equipped with noisy quantum memories and performing imperfect entanglement purification and swapping. We observe that increasing the number of memories on end nodes leads to a higher entanglement distribution rate per memory and higher probability of high-fidelity entanglement distribution, at least for the case with perfect operations. When imperfect operations are considered, however, we make the surprising observation that the per-memory entanglement rate decreases with increasing number of memories. Our results suggest that building quantum repeaters that perform well under realistic conditions requires careful modeling and design that takes into consideration the operations and resources that are finite and imperfect. |
| title | Entanglement Distribution in Quantum Repeater with Purification and Optimized Buffer Time |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2305.14573 |