Capacity of multimode quantum Gaussian channels
Year: 2026
Type: article
Abstract: We derive explicit formulas for the capacity of multimode quantum Gaussian channels which serve as a fundamental model for optical version of multiple-input multiple-output channels. We show that increasing the number of modes under fixed power constraint does not reduce the capacity. We derive an analytical formula for the ensemble-averaged Holevo capacity in the case of random passive transformations. The analogous results are also obtained for capacities achievable under homodyne and heterodyne detection. We further discuss the generalization of the model to include weak active transformations.
Source: Journal of Lightwave Technology
Authors: Maria Poplawska, Marcin Jarzyna
Institution: University of Warsaw
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,645
OpenAlex ID: W7214219553