Quantum Teleportation Over a Noisy Relay Channel

2026-09-20

AI Summary

研究在噪声中继信道下的量子隐形传态问题，通过引入两种模型及压缩前向编码方案来减少信道噪声，优化通信效率。

Abstract

Quantum teleportation and Bell measurements are considered in a noisy relay setting. We introduce two quantum relay-channel models with closed-form capacity formulas, motivated by the canonical quantum communication protocols of teleportation and superdense coding. In both models, the sender transmits a qubit, while the relay observes side information about the Pauli errors that occur in the channel and communicates with the receiver through an orthogonal rate-limited link. We develop a compress-forward coding scheme in which the relay compresses the Pauli-error sequence into bins and sends the bin index to the receiver. The receiver uses this partial error information to reduce the effective channel noise before quantum decoding. We show that this strategy is optimal by establishing matching converse bounds for both models.

Problem

• Quantum Teleportation
• Noisy Relay Channel
• Pauli Errors

Innovation

• Quantum Teleportation
• Noisy Relay Channel
• Compress-Forward Coding
• Pauli Errors