Unconditional quantum teleportational advantage of single photons
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866917075725844480 |
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| author | Peng, Li-Chao Wu, Dian Gu, Xue-Mei Qin, Jian Xu, Ke-Mi Zhong, Han-Sen Wang, Hui He, Yu-Ming Chen, Ming-Chen Li, Li Liu, Nai-Le Lu, Chao-Yang Pan, Jian-Wei |
| author_facet | Peng, Li-Chao Wu, Dian Gu, Xue-Mei Qin, Jian Xu, Ke-Mi Zhong, Han-Sen Wang, Hui He, Yu-Ming Chen, Ming-Chen Li, Li Liu, Nai-Le Lu, Chao-Yang Pan, Jian-Wei |
| contents | Photon loss is the biggest enemy in quantum communications. Direct transmission typically results in a small fraction of photons surviving over long distances, hindering advanced applications such as loophole-free Bell tests and device-independent quantum key distribution. Quantum teleportation offers a "disembodied" way of transferring particles through a virtual channel--quantum entanglement--which, in principle, could overcome the photon transmission loss. Experimentally, however, no previous quantum teleportation of single photons has shown a higher survival probability than using direct transmission. To overcome this challenge, here we first propose and demonstrate an all-optical scheme for remote preparation of entangled photons. Through an effective 15-dB channel loss, we realize a heralding efficiency of 82% for event-ready entangled photons. Based on the prior distributed entanglement, we demonstrate that teleportation-based transmission efficiency offers a 2.95-fold enhancement, compared to using direct transmission through the same channel, therefore establishing an unconditional teleportational advantage. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_08951 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unconditional quantum teleportational advantage of single photons Peng, Li-Chao Wu, Dian Gu, Xue-Mei Qin, Jian Xu, Ke-Mi Zhong, Han-Sen Wang, Hui He, Yu-Ming Chen, Ming-Chen Li, Li Liu, Nai-Le Lu, Chao-Yang Pan, Jian-Wei Quantum Physics Photon loss is the biggest enemy in quantum communications. Direct transmission typically results in a small fraction of photons surviving over long distances, hindering advanced applications such as loophole-free Bell tests and device-independent quantum key distribution. Quantum teleportation offers a "disembodied" way of transferring particles through a virtual channel--quantum entanglement--which, in principle, could overcome the photon transmission loss. Experimentally, however, no previous quantum teleportation of single photons has shown a higher survival probability than using direct transmission. To overcome this challenge, here we first propose and demonstrate an all-optical scheme for remote preparation of entangled photons. Through an effective 15-dB channel loss, we realize a heralding efficiency of 82% for event-ready entangled photons. Based on the prior distributed entanglement, we demonstrate that teleportation-based transmission efficiency offers a 2.95-fold enhancement, compared to using direct transmission through the same channel, therefore establishing an unconditional teleportational advantage. |
| title | Unconditional quantum teleportational advantage of single photons |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.08951 |