Quantum networks are the next step in the development of secure communication systems and have the potential to revolutionize the way we communicate. In a new study, researchers have identified a path towards the realization of such networks using erbium ions embedded in crystals. The research, published in Nature Photonics, describes the process of doping crystals with erbium atoms to form a quantum network. The team used a combination of laser light and a combination of erbium ions to create a quantum network in a crystal, allowing for communication between two distinct points. This could be used to create secure communication channels, allowing for the transmission of information without the risk of eavesdropping. The study is a major step forward in the development of quantum networks that could eventually be used in a wide range of applications.

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source: Phys.org