We address quantum phase channels, i.e communication schemes where information is encoded in the phase-shift imposed to a given signal, and analyze their performances in the presence of phase diffusion. We evaluate mutual information for coherent and phase-coherent signals, and for both ideal and realistic phase receivers. We show that coherent signals offer better performances than phase-coherent ones, and that realistic phase channels are effective ones in the relevant regime of low energy and large alphabets.

Noisy quantum phase communication channels / B. Teklu, J. Trapani, S. Olivares, M.G.A. Paris. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - 90:7(2015), pp. 074027.1-074027.6. [10.1088/0031-8949/90/7/074027]

Noisy quantum phase communication channels

J. Trapani
Secondo
;
S. Olivares
Penultimo
;
M.G.A. Paris
Ultimo
2015

Abstract

We address quantum phase channels, i.e communication schemes where information is encoded in the phase-shift imposed to a given signal, and analyze their performances in the presence of phase diffusion. We evaluate mutual information for coherent and phase-coherent signals, and for both ideal and realistic phase receivers. We show that coherent signals offer better performances than phase-coherent ones, and that realistic phase channels are effective ones in the relevant regime of low energy and large alphabets.
quantum communications; quantum phase; optical communication
Settore FIS/03 - Fisica della Materia
2015
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/312668
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