Bonn Team’s Technology Brings Quantum Networks Closer to Reality

Researchers from the University of Bonn demonstrated quantum entanglement between a stationary qubit and a photon with direct coupling to an optical fiber. The work represents a major step toward the realization of quantum networks and, from them, secure data transmission. Quantum networks necessitate stationary qubits be entangled with the communication channel, typically consisting of photons. A quantum state cannot be copied and transmitted in a classical sense. Photons, though difficult to store, are typically favored for transmission in quantum communication applications, both those that are in practice and those that are theoretical, due to their speed. “The implementation of efficient interfaces between photons and...