Quantum Entanglement Self-testing Protocol. Quantum entanglement is key to quantum information processing. With the fragile state of quantum bits, device-independent certification of entangled states demands self-testing. “The central aim of self-testing is to certify the state and measurements of quantum systems without any knowledge of their inner workings, even when the used devices cannot be trusted.” Scientists at the University of Science and Technology of China, have developed a self-testing method “as a practical tool for developing quantum techniques.” In their work, the team implements a proof-of-concept experiment for a complete entangled state self-testing protocol. Such a protocol, when properly established, may permit enhanced fidelity in results of quantum information.
