# Adaptive Routing for Quantum Memory Failures in the Quantum Internet

## TL;DR

This paper proposes an adaptive routing method for quantum Internet networks that efficiently manages quantum memory failures by quickly finding replacement paths, ensuring seamless quantum communication despite node failures.

## Contribution

It introduces a novel adaptive routing approach using a base-graph to handle quantum memory failures in the quantum Internet, enhancing network resilience.

## Key findings

- Efficient identification of shortest replacement paths in quantum networks.
- Seamless network transmission despite quantum memory failures.
- Applicable to practical long-distance quantum communication networks.

## Abstract

We define an adaptive routing method for the management of quantum memory failures in the quantum Internet. In the quantum Internet, the entangled quantum states are stored in the local quantum memories of the quantum nodes. A quantum memory failure in a particular quantum node can destroy several entangled connections in the entangled network. A quantum memory failure event makes the immediate and efficient determination of shortest replacement paths an emerging issue in a quantum Internet scenario. The replacement paths omit those nodes that are affected by the quantum memory failure to provide a seamless network transmission. In the proposed solution, the shortest paths are determined by a base-graph, which contains all information about the overlay quantum network. The method provides efficient adaptive routing in quantum memory failure scenarios of the quantum Internet. The results can be straightforwardly applied in practical quantum networks, including long-distance quantum communications.