Work

Hybrid analog teleportation-direct transmission in noisy bosonic channels

Year: 2026

Type: article

Abstract: Quantum teleportation uses a shared entangled resource, local operations, and a digitally error-corrected classical channel to transfer quantum states between distant parties. We introduce a hybrid teleportation-direct transmission protocol for state transfer that still exploits entanglement, but replaces classical communication and digital error correction with an feedforward through a noisy quantum channel. We show that quantum teleportation outperforms this protocol if the communication channel reduces the entanglement of all bipartite states having the same amount of entanglement as the resource; otherwise, the hybrid protocol is optimal. We apply our result to the state transfer of a uniformly distributed coherent-states codebook, highlighting experimentally relevant scenarios where our protocol is most effective. Our findings are directly relevant to both optical and superconducting microwave channels, where analog feedforward techniques have been recently implemented.

Source: Physical Review A

DOI: 10.1103/5jzq-tjpp

Authors: Uesli Alushi, Simone Felicetti, Roberto Di Candia

Institutions: Aalto University, Institute for Complex Systems, National Research Council, Sapienza University of Rome, University of Pavia

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,675

Funders: Compagnia di San Paolo, European Commission, Academy of Finland