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. TrapaniSecondo
;S. OlivaresPenultimo
;M.G.A. ParisUltimo
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.File | Dimensione | Formato | |
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