Physics – Quantum Physics
Scientific paper
2010-02-02
Phys. Rev. A 81, 032310 (2010)
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevA.81.032310
We study how to protect quantum information in quantum systems subjected to local dissipation. We show that combining the use of three-level systems, environment monitoring, and local feedback can fully and deterministically protect any available quantum information, including entanglement initially shared by different parties. These results can represent a gain in resources and/or distances in quantum communication protocols such as quantum repeaters and teleportation as well as time for quantum memories. Finally, we show that monitoring local environments physically implements the optimum singlet conversion protocol, essential for classical entanglement percolation.
Cavalcanti Daniel
Cunha Marcelo Terra
Marques Breno
Mascarenhas Eduardo
Santos Fran\cca M.
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