Quantum Entangled Bits Step Closer to IT

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Science  21 Jul 2000:
Vol. 289, Issue 5478, pp. 405-406
DOI: 10.1126/science.289.5478.405

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In contrast to today's computers, quantum computers and information technologies may in future be able to store and transmit information not only in the state "0" or "1," but also in superpositions of the two; information will then be stored and transmitted in entangled quantum states. Zeilinger discusses recent advances toward using this principle for quantum cryptography and highlights studies into the entanglement (or controlled superposition) of several photons, atoms, or ions.