2010/01/11 by Vladyslav C. Usenko, Matteo G. A. Paris · 1 citation
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1016/j.physleta.2010.01.016
published as Phys. Lett. A 374, 1342 (2010) · 8 pages, 2 figures, to appear in Phys. Lett. A
arxiv created 2010/01/11 · openalex publication_date 2010/01/12 · arxiv updated 2010/03/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We address the effects of realistic photodetection, with nonunit quantum efficiency and background noise (dark counts), on the performances of quantum communication schemes based on photon-number entangled states. We consider channels based on Gaussian twin-beam states and non-Gaussian two-mode coherent states and evaluate the channel capacity by optimizing the bit discrimination threshold. We found that TWB-based channels are more robust against noise than TMC-based ones and that this result is almost independent on the statistics of dark counts.