Quantum key distribution based on arbitrarily-weak distillable entangled states

Details Quantum key distribution based on arbitrarily-weak distillable entangled states Quantum key distribution based on arbitrarily-weak distillable entangled states

2005-10-10

arxiv.org/abs/quant-ph/0510067v2

Physical Review Letters 96, 070501 (2006)

Physics

Quantum Physics

5 pages, 1 figure; v2 has minor corrections

Scientific paper

10.1103/PhysRevLett.96.070501

States with private correlations but little or no distillable entanglement were recently reported. Here, we consider the secure distribution of such states, i.e., the situation when an adversary gives two parties such states and they have to verify privacy. We present a protocol which enables the parties to extract from such untrusted states an arbitrarily long and secure key, even though the amount of distillable entanglement of the untrusted states can be arbitrarily small.

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