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Quantum Cryptography Systems Theory Single Photon Sources Philippe Grangier, Institute of Optics Orsay Cedex, France www.iota.u-psud.fr/~grangier/Quantum_optics.html Ataç Imamoglu, University of California at Santa Barbara Santa Barbara, California www.ece.ucsb.edu/Faculty/Imamoglu/default.html Andrew Shields, Toshiba Cambridge Research Laboratory Cambridge, England www.toshiba-europe.com/research/crl/index.html Yoshihisa Yamamoto, Stanford University Palo Alto, California stanford.edu/group/ginzton/faculty/yamamoto.html What to Look For Equipment and capabilities: Electric, room-temperature single-photon sources Gigahertz single-photon sources Efficient sources of entangled photons Gigahertz entangled-photon sources Efficient room-temperature photon detectors Gigahertz photon detectors Quantum repeaters or relays Gigahertz quantum repeaters Multi-photon quantum cryptography Implementations: Gigabit-per-second point-to-point Via satellite On a network On the Internet Threat levels: 10-qubit quantum computer (practical quantum systems possible) 100-qubit quantum computer (large-scale within a decade) 1,000-qubit quantum computer (encryption codes compromised) |
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