A Belief Propagation-based Quantum Joint-Detection Receiver for Superadditive Optical Communications

Narayanan Rengaswamy; Kaushik P. Seshadreesan; Saikat Guha; Henry Pfister

doi:10.1364/CLEO_QELS.2021.FW3N.8

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2021),
paper FW3N.8
•https://doi.org/10.1364/CLEO_QELS.2021.FW3N.8

A Belief Propagation-based Quantum Joint-Detection Receiver for Superadditive Optical Communications

Narayanan Rengaswamy, Kaushik P. Seshadreesan, Saikat Guha, and Henry Pfister

CLEO: QELS_Fundamental Science 2021

San Jose, California United States
9–14 May 2021
ISBN: 978-1-943580-91-0

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Machine Learning and Applications (FW3N)

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N. Rengaswamy, K. P. Seshadreesan, S. Guha, and H. Pfister, "A Belief Propagation-based Quantum Joint-Detection Receiver for Superadditive Optical Communications," in Conference on Lasers and Electro-Optics, J. Kang, S. Tomasulo, I. Ilev, D. Müller, N. Litchinitser, S. Polyakov, V. Podolskiy, J. Nunn, C. Dorrer, T. Fortier, Q. Gan, and C. Saraceno, eds., OSA Technical Digest (Optica Publishing Group, 2021), paper FW3N.8.

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Abstract

We design a quantum joint-detection receiver for binary-phase-shift-keyed optical communications using belief propagation with quantum messages. For an exemplary tree code, the receiver attains the block-Helstrom limit in discriminating the codewords and achieves superadditive capacity.

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