# Multiplexed entanglement generation over quantum networks using multi-qubit nodes

## TL;DR

This paper analyzes multiplexed entanglement protocols in quantum networks with multi-qubit nodes, highlighting their potential to overcome propagation bottlenecks and guiding future research directions.

## Contribution

It provides a comparative analysis of multiplexed entanglement protocols using realistic models for quantum network hardware, identifying key parameters for performance enhancement.

## Key findings

- Multiplexed protocols can significantly increase entanglement rates.
- Nitrogen-vacancy centers are promising platforms for near-term implementation.
- Improving specific network parameters yields substantial performance gains.

## Abstract

Quantum networks distributed over distances greater than a few kilometers will be limited by the time required for information to propagate between nodes. We analyze protocols that are able to circumvent this bottleneck by employing multi-qubit nodes and multiplexing. For each protocol, we investigate the key network parameters that determine its performance. We model achievable entangling rates based on the anticipated near-term performance of nitrogen-vacancy centres and other promising network platforms. This analysis allows us to compare the potential of the proposed multiplexed protocols in different regimes. Moreover, by identifying the gains that may be achieved by improving particular network parameters, our analysis suggests the most promising avenues for research and development of prototype quantum networks.