Starting from the experience of our Matera experiment we study the atmosphere propagating channel as it will be the only medium where our quantum bits or optical coherent pulse will travel. We will be able to overcome the losses and noise introduce by the atmosphere with particular attention to the problem of maintaining the coherence property, augmenting the spatial pointing and improving the performances of all our different experiments assuring a good wavefront in the receiving telescopes.

We will essentially create the mathematical description of the quantum channel. This research activity will be helpful also for the classical optical communications.

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