7 papers
Stellar Braid Monodromy of Finite-Rank Non-Gaussian Photonic States
Arnaud Coatanhay, Angelique Dremeau
Finite-rank non-Gaussian bosonic states admit a holomorphic description in the Bargmann representation: after a zero-free Gaussian factor is separated off, their non-Gaussian struc…
A Wigner-based volumetric transport framework for paraxial waves in random media
Arnaud Coatanhay, Thomas Bonnafont, Angélique Dremeau +1
We develop a Wigner-based phase-space framework for mean paraxial wave propagation in random media. Starting from the random parabolic wave equation, we derive the exact evolution…
Free-Space CV-QKD with Single-Mode Fiber Reception: Effective Coupling Statistics and Protocol-Dependent Reference Noise
Hesham S. Ibrahim, Arnaud Coatanhay
We study free-space continuous-variable quantum key distribution (CV-QKD) with single-mode fiber (SMF) reception under atmospheric turbulence. The optical channel is modeled by spl…
Performance Analysis of Underwater Quantum Key Distribution Protocols: BB84, SARG04, and BBM92
Nour Rizk, Angélique Drémeau, Angélique Drémeau +1
This study compares the quantum bit error rate (QBER) performance of BB84, SARG04, and the entanglement-based BBM92 protocol in non-turbulent underwater optical channels. Clear, co…
CV-QKD over Turbulence Channels with Virtual Photon Subtraction and Quantum Multiple-Symbol Detection for Underwater Quantum Communications
Nour Rizk, Hesham S. Ibrahim, Angélique Drémeau +1
Continuous-variable quantum key distribution (CV-QKD) is a promising approach for secure underwater quantum communications (UQCs), where propagation loss, scattering, turbulence, a…
Non-Maximally Entangled States for Quantum Key Distribution in Underwater Channels: BBM92 Protocol via Kraus Operators
Nour Rizk, Angélique Drémeau, Arnaud Coatanhay
Underwater optical channels pose significant challenges to the security and reliability of quantum communication systems due to absorption and scattering. In this paper, we investi…