Serialized Quantum Error Correction Protocol for High-Bandwidth Quantum Repeaters

TL;DR

This paper proposes a serialized quantum error correction protocol enabling high-rate, long-distance quantum communication with optical fibers, potentially surpassing single-photon transmission performance under certain error thresholds.

Contribution

It introduces a novel serialized protocol for quantum error correction that achieves high entangled bit rates over long distances with minimal matter qubits.

Findings

Potential to generate 10^8 ebits/sec over long distances

Improved ebit rates compared to single-photon transmission

Performance depends on error and loss thresholds

Abstract

Advances in single photon creation, transmission, and detection suggest that sending quantum information over optical fibers may have losses low enough to be correctable using a quantum error correcting code. Such error-corrected communication is equivalent to a novel quantum repeater scheme, but crucial questions regarding implementation and system requirements remain open. Here we show that long range entangled bit generation with rates approaching $10^8$ ebits/s may be possible using a completely serialized protocol, in which photons are generated, entangled, and error corrected via sequential, one-way interactions with a minimal number of matter qubits. Provided loss and error rates of the required elements are below the threshold for quantum error correction, this scheme demonstrates improved performance over transmission of single photons. We find improvement in ebit rates at large distances using this serial protocol and various quantum error correcting codes.