Deterministic entanglement-assisted quantum communication over 20 km fiber channel.

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 classi

SUBMITTER: Ren S 

PROVIDER: S-EPMC12830655 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature