Continuous Variable Quantum Cryptography - beating the 3 dB loss limit

Abstract

We demonstrate that secure quantum key distribution systems based on continuous variables implementations can operate beyond the apparent 3 dB loss limit that is implied by the beam splitting attack . The loss limit was established for standard minimum uncertainty states such as coherent states. We show that by an appropriate postselection mechanism we can enter a region where Eve's knowledge falls behind the information shared between Alice and Bob even in the presence of substantial losses.

4 pages, 2 figures

References in corpus (3)

• Continuous variable quantum cryptography using coherent states
• Quantum key distribution with bright entangled beams
• Quantum key distribution using non-classical photon number correlations in macroscopic light pulses

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