Entanglement distribution in quantum networks via swapping of partially entangled pure states
This work addresses the challenge of efficient entanglement distribution in quantum networks, but it appears incremental as it extends existing ideas to different topologies without introducing a new paradigm.
The paper tackles the problem of distributing quantum entanglement across various network topologies using entanglement swapping with partially entangled pure states, and it analyzes the evolution of entanglement and success probabilities for generating maximally entangled states.
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.