Quantum internet using code division multiple access

TL;DR

This paper introduces a quantum code division multiple access (q-CDMA) method that encodes quantum data chaotically to improve transmission efficiency and rate in large-scale quantum networks, especially under noisy conditions.

Contribution

The paper presents a novel q-CDMA approach that uses chaos synchronization for quantum data transmission, offering higher information rates compared to existing methods like FDMA.

Findings

q-CDMA significantly increases information rates in noisy channels

Chaos synchronization effectively separates multiple quantum data streams

q-CDMA outperforms traditional frequency division methods

Abstract

A crucial open problem in large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs. In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.