Quantum State Transfer via Noisy Photonic and Phononic Waveguides

TL;DR

This paper introduces a robust quantum state transfer protocol through noisy waveguides, utilizing quantum error correction and advanced simulation techniques, applicable to photonic and phononic quantum networks.

Contribution

It presents a novel noise-immune quantum state transfer method with error correction, extending to cavity QED systems and thermal environments.

Findings

Protocol achieves faithful transfer despite noise

Quantum error correction improves robustness

Numerical simulations validate the approach

Abstract

We describe a quantum state transfer protocol, where a quantum state of photons stored in a first cavity can be faithfully transferred to a second distant cavity via an infinite 1D waveguide, while being immune to arbitrary noise (e.g. thermal noise) injected into the waveguide. We extend the model and protocol to a cavity QED setup, where atomic ensembles, or single atoms representing quantum memory, are coupled to a cavity mode. We present a detailed study of sensitivity to imperfections, and develop a quantum error correction protocol to account for random losses (or additions) of photons in the waveguide. Our numerical analysis is enabled by Matrix Product State techniques to simulate the complete quantum circuit, which we generalize to include thermal input fields. Our discussion applies both to photonic and phononic quantum networks.