Performance metrics for the continuous distribution of entanglement in multiuser quantum networks

Performance metrics for the continuous distribution of entanglement in multiuser quantum networks

Gómez Iñesta, A. (TU Delft QID/Wehner Group; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Wehner, S.D.C. (TU Delft QID/Wehner Group; TU Delft Quantum Computer Science; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)

2023

Entangled states shared among distant nodes are frequently used in quantum network applications. When quantum resources are abundant, entangled states can be continuously distributed across the network, allowing nodes to consume them whenever necessary. This continuous distribution of entanglement enables quantum network applications to operate continuously while being regularly supplied with entangled states. Here, we focus on the steady-state performance analysis of protocols for continuous distribution of entanglement. We propose the virtual neighborhood size and the virtual node degree as performance metrics. We utilize the concept of Pareto optimality to formulate a multiobjective optimization problem to maximize the performance. As an example, we solve the problem for a quantum network with a tree topology. One of the main conclusions from our analysis is that the entanglement consumption rate has a greater impact on the protocol performance than the fidelity requirements. The metrics that we establish in this paper can be utilized to assess the feasibility of entanglement distribution protocols for large-scale quantum networks.

http://resolver.tudelft.nl/uuid:07b1e3e5-2ffb-4892-b572-b16b6d140880

https://doi.org/10.1103/PhysRevA.108.052615

2469-9926

Physical Review A: covering atomic, molecular, and optical physics and quantum information, 108 (5)

Institutional Repository

journal article

© 2023 A. Gómez Iñesta, S.D.C. Wehner