Entanglement distribution in quantum networks via swapping of partially entangled pure states

Abstract

The entanglement swapping protocol (ESP) is a fundamental primitive for distributing quantum correlations across distant nodes in a quantum network. Recent studies have demonstrated that even when the involved qubit pairs are only partially entangled, it is still possible to concentrate and transmit entanglement via Bell-basis measurements. In this work, we extend these ideas to quantum networks with various topologies--including linear, star, and hybrid configurations--by analysing the application of the ESP to initially partially entangled pure states. We investigate how entanglement evolves under such protocols by considering the transformations of the initial states and evaluating the success probabilities for generating maximally entangled states at the output. Our results offer new insights into the dynamics of the entanglement distribution in quantum networks.

11 pages, 8 figures

References in corpus (11)

• The Quantum Internet
• Quantum Computing
• Quantum repeaters: From quantum networks to the quantum internet
• Distributed Quantum Computing: a Survey
• Towards real-world quantum networks: a review
• Nonlocal correlations in the star-network configuration
• Entanglement Distribution in Pure-State Quantum Networks
• Entanglement swapping and swapped entanglement
• Average concurrence and entanglement swapping
• Operational connection between predictability and entanglement in entanglement swapping from partially entangled pure states
• Local predictability and coherence versus distributed entanglement in entanglement swapping from partially entangled pure states