Gaussian error correction of quantum states in a correlated noisy channel

TL;DR

This paper introduces an experimentally validated linear optics protocol that effectively protects quantum states from correlated non-Markovian noise, significantly enhancing quantum communication reliability.

Contribution

The work presents a novel, experimentally demonstrated protocol for error correction in quantum states that specifically addresses correlated non-Markovian noise in quantum channels.

Findings

Near-ideal protection of quantum states achieved

Effective in highly noisy, correlated environments

Applicable to real-world quantum communication systems

Abstract

Noise is the main obstacle for the realization of fault tolerant quantum information processing and secure communication over long distances. In this work, we propose a communication protocol relying on simple linear optics that optimally protects quantum states from non-Markovian or corre- lated noise. We implement the protocol experimentally and demonstrate the near ideal protection of coherent and entangled states in an extremely noisy channel. Since all real-life channels are exhibit- ing pronounced non-Markovian behavior, the proposed protocol will have immediate implications in improving the performance of various quantum information protocols.