Performance analysis of near-term quantum networks

Raja Yehia, Simon Neves, Eleni Diamanti +1 more

We present the architecture and analyze the applications of a metropolitan-scale quantum network that requires only limited hardware resources for end users. Using NetSquid, a quantum network simulation tool based on discrete events, we assess the performance of several quantum network protocols involving two or more users in various configurations in terms of topology, hardware and trust choices. Our analysis takes losses and errors into account and considers realistic parameters corresponding to present or near-term technology. Our results show that practical quantum-enhanced network functionalities are within reach today and can prepare the ground for further applications when more advanced technology becomes available.

Shahad A. Hussein, Alharith A. Abdullah

Денис Дмитриевич Сукачев

Suzanne B. van Dam, Peter C Humphreys, Filip Rozpędek +2 more

Abstract Quantum networks distributed over distances greater than a few kilometres will be limited by the time required for information to propagate between nodes. We analyse 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.

Mahla Moridi Farimani, Yousef Mafi

Abstract Multi-hop quantum teleportation is a fundamental technique for enabling scalable, long-distance quantum communication, making it a key building block for future quantum networks. In this paper, we present a generalized multi-hop quantum controlled teleportation (MQCT) protocol that enables more flexible transfer across complex network architectures. We perform a detailed analysis of the protocol’s performance under realistic noise conditions, focusing on the impact of various noise sources on both the teleportation process and the underlying quantum channels. To assess its practical performance, we implemented the protocol on an IBM quantum (IBMQ) computer. The experimental results demonstrate the feasibility of the protocol in near-term quantum devices and provide valuable insights into its behavior under real-world quantum noise, paving the way for more reliable quantum communication systems.

Riccardo Bassoli, Holger Boche, Christian Deppe +4 more