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Quantum Cryptography Using Entangled Photons in Energy-Time Bell States

Published in Physical Review Letters. 2000, vol. 84, no. 20, p. 4737-4740
Abstract We present a setup for quantum cryptography based on photon pairs in energy-time Bell states and show its feasibility in a laboratory experiment. Our scheme combines the advantages of using photon pairs instead of faint laser pulses and the possibility to preserve energy-time entanglement over long distances. Moreover, using four-dimensional energy-time states, no fast random change of bases is required in our setup: Nature itself decides whether to measure in the energy or in the time base, thus rendering eavesdropper attacks based on “photon number splitting” less efficient.
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TITTEL, Wolfgang et al. Quantum Cryptography Using Entangled Photons in Energy-Time Bell States. In: Physical Review Letters, 2000, vol. 84, n° 20, p. 4737-4740. https://archive-ouverte.unige.ch/unige:37039

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Deposited on : 2014-06-02

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