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Journal Article

Coherent-state information concentration and purification in atomic memory


Filip,  Radim
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Herec, J., & Filip, R. (2006). Coherent-state information concentration and purification in atomic memory. PHYSICAL REVIEW A, 74(6): 062306. doi:10.1103/PhysRevA.74.062306.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6D72-0
We propose a feasible method of coherent-state information concentration and purification utilizing quantum memory. The method allows us to optimally concentrate and purify information carried by many noisy copies of an unknown coherent state (randomly distributed in time) to a single copy. Thus nonclassical resources and operations can be saved, if we compare information processing with many noisy copies and a single copy with concentrated and purified information.