Physics – Quantum Physics
Scientific paper
2008-12-03
Physics
Quantum Physics
13 pages, 4 figures. It's the first submitted version to the Nature Physics. The final version is already published on Nature
Scientific paper
10.1038/nphys1112
The distribution of entangled states between distant parties in an optical network is crucial for the successful implementation of various quantum communication protocols such as quantum cryptography, teleportation and dense coding [1-3]. However, owing to the unavoidable loss in any real optical channel, the distribution of loss-intolerant entangled states is inevitably inflicted by decoherence, which causes a degradation of the transmitted entanglement. To combat the decoherence, entanglement distillation, which is the process of extracting a small set of highly entangled states from a large set of less entangled states, can be used [4-14]. Here we report on the mesoscopic distillation of deterministically prepared entangled light pulses that have undergone non-Gaussian noise. The entangled light pulses [15-17] are sent through a lossy channel, where the transmission is varying in time similarly to light propagation in the atmosphere. By employing linear optical components and global classical communication, the entanglement is probabilistically increased.
Andersen Ulrik L.
Dong Ruifang
Filip} Radim
Heersink Joel
Lassen Mikael
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