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Journal Article

Experimental purification of coherent states

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Andersen,  Ulrik
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs,  Gerd
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Andersen, U., Filip, R., Fiurasek, J., Josse, V., & Leuchs, G. (2005). Experimental purification of coherent states. PHYSICAL REVIEW A, 72(6): 060301. doi:10.1103/PhysRevA.72.060301.


Cite as: https://hdl.handle.net/21.11116/0000-0002-97A9-5
Abstract
We propose a scheme for optimal Gaussian purification of coherent states
from several imperfect copies. The proposal is experimentally
demonstrated for the case of two copies of a coherent state sent through
independent noisy channels. Our purification protocol relies on only
linear optics and an ancilla vacuum state, rendering this approach an
interesting alternative to the more complex protocols of entanglement
distillation and quantum error correction.