Ulrik Lund Andersen og Mikael Lassen står bag ny pulikation i Nature Physics.
Artiklen udkom d. 2. november 2008 og kan findes via dette link.
The distribution of highly entangled states between very distant parties in an optical network is crucial for the successful implementation of various quantum communication protocols such as quantum cryptography, quantum teleportation and quantum dense coding. 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. Here we report on the mesoscopic distillation of deterministically prepared entangled light pulses that have undergone non-Gaussian noise. The entangled light pulses are generated in optical fibers and sent through a lossy channel, where the transmission is varying in time similarly to light propagation in the atmosphere. By employing linear optical components, a measurement induced operation and classical communication between the two parties, the entanglement is probabilistically increased.
- Publikationen er resultatet af et samarbejde mellem Max-Planck instituttet i Erlangen, Tyskland og Palacky Universitetet i Olomouc, Tjekkiet.
- Projektet er finansieret af EU (COMPAS) og Forsknings- og innovationsstyrelsen (FTP).