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Entanglement-based continuous-variable quantum key distribution with multimode states and detectors
Vladyslav C. Usenko, Laszlo Ruppert, Radim Filip
Secure quantum key distribution with multimode Gaussian entangled states and multimode homodyne detectors is proposed. In general the multimode character of both the sources of ent…
Long-distance continuous-variable quantum key distribution with efficient channel estimation
László Ruppert, Vladyslav C. Usenko, Radim Filip
We investigate the main limitations which prevent the continuous-variable quantum key distribution protocols from achieving long distances in the finite-size setting. We propose a…
Low-noise macroscopic twin beams
Timur Sh. Iskhakov, Vladyslav C. Usenko, Radim Filip +2
Applying a multiphoton-subtraction technique to two-color macroscopic squeezed vacuum state of light generated via high-gain parametric down conversion we conditionally prepare a n…
Complete elimination of information leakage in continuous-variable quantum communication channels
Christian S. Jacobsen, Lars S. Madsen, Vladyslav C. Usenko +2
In all lossy communication channels realized to date, information is inevitably leaked to a potential eavesdropper. Here we present a communication protocol that does not allow for…