Deterministic entanglement-assisted quantum communication over 20 km fiber channel

Siyu Ren; Yanru Yan; Yalin Li; Chao Li; Dongmei Han; Xuezhi Zhu; Meihong Wang; Xiaolong Su

doi:10.1038/s41377-025-02173-6

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Deterministic entanglement-assisted quantum communication over 20 km fiber channel

Original Articles

- Deterministic entanglement-assisted quantum communication over 20 km fiber channel
- Deterministic entanglement-assisted quantum communication over 20 km fiber channel
- Light: Science & Applications 2026年15卷第3期页码：926-935
- Affiliations：
  
  1.State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan, China
  2.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
- Author bio：
  
  Xiaolong Su (suxl@sxu.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02173-6
  中图分类号：
- 收稿：2025-07-16，
  
  修回：2025-12-01，
  
  录用：2025-12-16，
  
  网络首发：2026-01-23，
  
  纸质出版：2026-03-31
- Accepted：
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Siyu Ren, Yanru Yan, Yalin Li, 等. Deterministic entanglement-assisted quantum communication over 20 km fiber channel[J]. Light: Science & Applications, 2026,15(3):926-935.

Ren, S. Y. et al. Deterministic entanglement-assisted quantum communication over 20 km fiber channel. Light: Science & Applications, 15, 926-935 (2026).
Siyu Ren, Yanru Yan, Yalin Li, 等. Deterministic entanglement-assisted quantum communication over 20 km fiber channel[J]. Light: Science & Applications, 2026,15(3):926-935. DOI： 10.1038/s41377-025-02173-6.

Ren, S. Y. et al. Deterministic entanglement-assisted quantum communication over 20 km fiber channel. Light: Science & Applications, 15, 926-935 (2026). DOI： 10.1038/s41377-025-02173-6.

摘要

Abstract

Entanglement-assisted quantum communication has substantial advantages in surpassing the power of classical communication by utilizing the entangled state. Up to now

most of entanglement-assisted quantum communications with dense coding are limited to the proof-of-principle experiments. Here

we experimentally demonstrate the deterministic entanglement-assisted quantum communication based on the continuous-variable (CV) entangled state over 20 km commercial fiber channels. We propose a new CV dense coding scheme with improved classical signals and show that the transmission distance of CV entanglement-assisted quantum communication can be extended compared with that using fixed classical signals. By applying the frequency division multiplexing technique

we simultaneously decode 10 classical signals submerged in the shot noise of coherent state with the help of CV entangled state after the transmission through a 20.121 km fiber channel. The results show that around 3 times of channel capacity in classical communication with coherent state are achieved in the CV entanglement-assisted communication with the frequency division multiplexing technique. Our result takes a crucial step towards realizing the deterministic metropolitan entanglement-assisted quantum communication in practical quantum channels.

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references

Piveteau, A. et al. Entanglement-assisted quantum communication with simple measurements. Nat. Commun. 13 , 7878 (2022)..

Gehring, T. et al. Implementation of continuous-variable quantum key distribution with composable and one-sided-device-independent security against coherent attacks. Nat. Commun. 6 , 8795 (2015)..

Walk, N. et al. Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution. Optica 3 , 634–642 (2016)..

Zhang, J. F. et al. One-sided device-independent random number generation through fiber channels. Light Sci. Appl. 14 , 25 (2025)..

Furusawa, A. et al. Unconditional quantum teleportation. Science 282 , 706–709 (1998)..

Ren, J.-G. et al. Ground-to-satellite quantum teleportation. Nature 549 , 70–73 (2017)..

Guo, Y. et al. Advances in quantum dense coding. Adv. Quantum Technol. 2 , 1900011 (2019)..

Su, X. L. et al. Gate sequence for continuous variable one-way quantum computation. Nat. Commun. 4 , 2828 (2013)..

Asavanant, W. et al. Generation of time-domain-multiplexed two-dimensional cluster state. Science 366 , 373–376 (2019)..

Larsen, M. V. et al. Deterministic generation of a two-dimensional cluster state. Science 366 , 369–372 (2019)..

Zhang, Z. S. et al. Entanglement-enhanced sensing in a lossy and noisy environment. Phys. Rev. Lett. 114 , 110506 (2015)..

Hao, S. H. et al. Demonstration of entanglement-enhanced covert sensing. Phys. Rev. Lett. 129 , 010501 (2022)..

Xia, Y. et al. Ent anglement-enhanced optomechanical sensing. Nat. Photonics 17 , 470–477 (2023)..

Bennett, C. H. & Wiesner, S. J. Communication via one- and two-particle operators on Einstein-Podolsky-Rosen states. Phys. Rev. Lett. 69 , 2881–2884 (1992)..

Su, X. L. et al. Dense-coding quantum key distribution based on continuous-variable entanglement. Phys. Rev. A 74 , 062305 (2006)..

Zhang, Y. C. et al. Long-distance continuous-variable quantum key distribution over 202.81 km of fiber. Phys. Rev. Lett. 125 , 010502 (2020)..

Wang, S. et al. Twin-field quantum key distribution over 830-km fibre. Nat. Photonics 16 , 154–161 (2022)..

Fan-Yuan, G.-J. et al. Robust and adaptable quantum key distribution network without trusted nodes. Optica 9 , 812–823 (2022)..

Wu, Q. et al. Integration of quantum key distribution and high-throughput classical communications in field-deployed multi-core fibers. Light Sci. Appl. 14 , 274 (2025)..

Kashi, A. K. & Kues, M. Frequency-bin-encoded entanglement-based quantum key distribution in a reconfigurable frequency-multiplexed network. Light Sci. Appl. 14 , 49 (2025)..

Steinlechner, S. et al. Quantum-dense metrology. Nat. Photonics 7 , 626–630 (2013)..

Mattle, K. et al. Dense coding in experimental quantum communication. Phys. Rev. Lett. 76 , 4656–4659 (1996)..

Li, X. Y. et al. Quantum dense coding exploiting a bright Einstein-Podolsky-Rosen beam. Phys. Rev. Lett. 88 , 047904 (2002)..

Mizuno, J. et al. Experimental demonstration of entanglement-assisted coding using a two-mode squeezed vacuum state. Phys. Rev. A 71 , 012304 (2005)..

Shi, S. P. et al. Demonstration of channel multiplexing quantum communication exploiting entangled sideband modes. Phys. Rev. Lett. 125 , 070502 (2020)..

Guo, H. et al. Generation of continuous-variable high-dimensional entanglement with three degrees of freedom and multiplexing quantum dense coding. Photonics Res. 10 , 2828–2835 (2022)..

Hu, X.-M. et al. Beating the channel capacity limit for superdense coding with entangled ququarts. Sci. Adv. 4 , eaat9304 (2018)..

Barreiro, J. T., Wei, T.-C. & Kwiat, P. G. Beating the channel capacity limit for linear photonic superdense coding. Nat. Phys. 4 , 282–286 (2008)..

Liang, S. C. et al. Frequency-division multiplexing continuous variable quantum dense coding with broadband entanglement. Laser Photonics Rev. 18 , 2400094 (2024)..

Fang, X. M. et al. Experimental implementation of dense coding using nuclear magnetic resonance. Phys. Rev. A 61 , 022307 (2000)..

Schaetz, T. et al. Quantum dense coding with atomic qubits. Phys. Rev. Lett. 93 , 040505 (2004)..

Zhang, W. et al. Quantum secure direct communication with quantum memory. Phys. Rev. Lett. 118 , 220501 (2017)..

Chen, Y. X. et al. Orbital angular moment um multiplexed quantum dense coding. Phys. Rev. Lett. 127 , 093601 (2021)..

Jing, J. T. et al. Experimental demonstration of tripartite entanglement and controlled dense coding for continuous variables. Phys. Rev. Lett. 90 , 167903 (2003)..

Bruß, D. et al. Distributed quantum dense coding. Phys. Rev. Lett. 93 , 210501 (2004)..

Hao, J.-C., Li, C.-F. & Guo, G.-C. Controlled dense coding using the Greenberger-Horne-Zeilinger state. Phys. Rev. A 63 , 054301 (2001)..

Shen, H. et al. Quantum communication network utilizing quadripartite entangled states of optical field. Phys. Rev. A 80 , 042320 (2009)..

Ban, M. Quantum dense coding viaa two-mode squeezed-vacuum state. J. Opt. B Quantum Semiclassical Opt. 1 , L9–L11 (1999)..

Zhang, J. & Peng, K. C. Quantum teleportation and dense coding by means of bright amplitude-squeezed light and direct measurement of a Bell state. Phys. Rev. A 62 , 064302 (2000)..

Braunstein, S. L. & Kimble, H. J. Dense coding for continuous variables. Phys. Rev. A 61 , 042302 (2000)..

Ralph, T. C. & Huntington, E. H. Unconditional continuous-variable dense coding. Phys. Rev. A 66 , 042321 (2002)..

Liang, S. C. et al. High-speed quantum radio-frequency-over-light communication. Phys. Rev. Lett. 132 , 140802 (2024)..

Petrovich, M. et al. Broadband optical fibre with an attenuation lower than 0.1 decibel per kilometre. Nat. Photonics 19 , 1203–1208 (2025)..

Degiovanni, I. P. et al. Quantum dense key distribution. Phys. Rev. A 69 , 032310 (2004)..

Chehimi, M. & Saad, W. Physics-informed quantum communication networks: A vision toward the quantum internet. IEEE Netw. 36 , 32–38 (2022)..

Li, Z. H. et al. Entanglement-assisted quantum networks: Mechanics, enabling technologies, challenges, and research directions. IEEE Commun. Surv. Tutor. 25 , 2133–2189 (2023)..

Fu, J. et al. Measurement-device-independent continuous variable entanglement witness in a quantum network. Light Sci. Appl. 14 , 376 (2025)..

Fan, Y.-R. et al. Quantum entanglement network enabled by a state-multiplexing quantum light source. Light Sci. Appl. 14 , 189 (2025)..

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