Life online remains vulnerable. Criminals can infiltrate bank accounts or steal personal identities, and AI is helping these attacks become more sophisticated. Quantum cryptography offers a promising defense by using the rules of quantum physics to secure communication against eavesdropping. Even so, building a functioning quantum internet still involves major technical challenges. A team at the Institute of Semiconductor Optics and Functional Interfaces (IHFG) at the University of Stuttgart has now made significant progress on one of the most difficult components, the "quantum repeater."
Their study appears in Nature Communications.
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