Superadditive Optical Quantum Communications

Overview

This project explores the theoretical foundations and challenges of integrating quantum superadditive technologies into existing optical networks, evaluating their performance in a noisy channel. The implementation is based on the concepts discussed in the paper "Perspectives on Superadditive Optical Quantum Communications" by Gabriella Cincotti, Marco Napoleone, and Matteo Rosati.

Key Concepts

1. Superadditive Quantum Communications: Utilizes joint detection receivers (JDR) to enhance system capacity beyond classical limits.
2. Hadamard machine (Green machine): Structured optical receivers using Hadamard codewords to improve spectral efficiency.
3. Fourier machine: Novel JDR based on Fourier codes, offering advantages in low-power optical settings.

Implementation Details

• Languages: MATLAB
• Frameworks: None

Project Structure

• Main/: Contains the source code for the implementation.
• MonteCarlo/: Monte Carlo class for simulating the performance of the system.
• Hadamard/: Implementation of the Hadamard codes.
• OOK/: Implementation of the on-off keying modulation.
• README.md: Project documentation.

Results

The project evaluates the performance of the superadditive quantum communication system in a noisy channel, comparing the Hadamard and Fourier machines.

Results

The project evaluates the performance of the superadditive quantum communication system in a noisy channel, comparing the Hadamard and Fourier machines.

Performance Evaluation

Below are the results of the Bit Error Rate (BER) versus Signal-to-Noise Ratio (SNR) for different configurations:

Contact

For any questions or issues, please contact Gabriella Cincotti at gabriella.cincotti@uniroma3.it.