Cosmic Quantum Network

Entanglement swapping can connect segmented quantum channels to form long-distance quantum channels, which is a key mechanism for realizing large-scale quantum networks and remote quantum communication. In this paper, we show the basic principles of entanglement swapping and propose a new calculation method to derive entanglement swapping results, which is demonstrated through the entanglement swapping between two bipartite entangled states. In addition, we propose an infinitely scalable star-shaped quantum network, which is composed of quantum computers connected through quantum channels. These computers interact with an observable universe: obtaining observational information from it and automatically providing feedback after processing the information.