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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2504.09791 |
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| _version_ | 1866908317432938496 |
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| author | Xing, Wen-Bo Lv, Min-Yu Zhang, Lingxia Guo, Yu Weilenmann, Mirjam Wei, Zhaohui Li, Chuan-Feng Guo, Guang-Can Hu, Xiao-Min Liu, Bi-Heng Navascués, Miguel Wang, Zizhu |
| author_facet | Xing, Wen-Bo Lv, Min-Yu Zhang, Lingxia Guo, Yu Weilenmann, Mirjam Wei, Zhaohui Li, Chuan-Feng Guo, Guang-Can Hu, Xiao-Min Liu, Bi-Heng Navascués, Miguel Wang, Zizhu |
| contents | Entanglement is the cornerstone of quantum communication, yet conventional detection relies solely on local measurements. In this work, we present a unified theoretical and experimental framework demonstrating that one-way local operations and classical communication (1-LOCC) can significantly outperform purely local measurements in detecting high-dimensional quantum entanglement. By casting the entanglement detection problem as a semidefinite program (SDP), we derive protocols that minimize false negatives at fixed false-positive rates. A variational generative machine-learning algorithm efficiently searches over high-dimensional parameter spaces, identifying states and measurement strategies that exhibit a clear 1-LOCC advantage. Experimentally, we realize a genuine event-ready protocol on a three-dimensional photonic entanglement source, employing fiber delays as short-lived quantum memories. We implement rapid, FPGA-based sampling of the optimized probabilistic instructions, allowing Bob's measurement settings to adapt to Alice's outcomes in real time. Our results validate the predicted 1-LOCC advantage in a realistic noisy setting and reduce the experimental trials needed to certify entanglement. These findings mark a step toward scalable, adaptive entanglement detection methods crucial for quantum networks and computing, paving the way for more efficient generation and verification of high-dimensional entangled states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_09791 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Practical Advantage of Classical Communication in Entanglement Detection Xing, Wen-Bo Lv, Min-Yu Zhang, Lingxia Guo, Yu Weilenmann, Mirjam Wei, Zhaohui Li, Chuan-Feng Guo, Guang-Can Hu, Xiao-Min Liu, Bi-Heng Navascués, Miguel Wang, Zizhu Quantum Physics Optics Entanglement is the cornerstone of quantum communication, yet conventional detection relies solely on local measurements. In this work, we present a unified theoretical and experimental framework demonstrating that one-way local operations and classical communication (1-LOCC) can significantly outperform purely local measurements in detecting high-dimensional quantum entanglement. By casting the entanglement detection problem as a semidefinite program (SDP), we derive protocols that minimize false negatives at fixed false-positive rates. A variational generative machine-learning algorithm efficiently searches over high-dimensional parameter spaces, identifying states and measurement strategies that exhibit a clear 1-LOCC advantage. Experimentally, we realize a genuine event-ready protocol on a three-dimensional photonic entanglement source, employing fiber delays as short-lived quantum memories. We implement rapid, FPGA-based sampling of the optimized probabilistic instructions, allowing Bob's measurement settings to adapt to Alice's outcomes in real time. Our results validate the predicted 1-LOCC advantage in a realistic noisy setting and reduce the experimental trials needed to certify entanglement. These findings mark a step toward scalable, adaptive entanglement detection methods crucial for quantum networks and computing, paving the way for more efficient generation and verification of high-dimensional entangled states. |
| title | Practical Advantage of Classical Communication in Entanglement Detection |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2504.09791 |