A5026225552- Quantum Information and Cryptography
- Optical Wireless Communication Technologies
- Orbital Angular Momentum in Optics
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Optical Network Technologies
- Molecular Communication and Nanonetworks
- Satellite Communication Systems
- Quantum optics and atomic interactions
- Advanced Photonic Communication Systems
- Advanced Fiber Optic Sensors
- graph theory and CDMA systems
- Radio Wave Propagation Studies
- Quantum and electron transport phenomena
- Adaptive optics and wavefront sensing
Sorbonne Université
2021-2024
Centre National de la Recherche Scientifique
2021-2024
Office National d'Études et de Recherches Aérospatiales
2021-2024
Laboratoire de Recherche en Informatique de Paris 6
2023-2024
Université Paris-Saclay
2021-2024
Université Paris Cité
2021
Société Nationale des Chemins de Fer Français (France)
2021
Abstract Future quantum communication infrastructures will rely on both terrestrial and space-based links integrating high-performance optical systems engineered for this purpose. In downlinks in particular, the loss budget variations signal propagation due to atmospheric turbulence effects impose a careful optimization of coupling light single-mode fibers required interfacing with receiving stations ground networks. work, we perform comprehensive study role adaptive optics (AO)...
Abstract We present and analyze an architecture for a European-scale quantum network using satellite links to connect Quantum Cities, which are metropolitan networks with minimal hardware requirements the end users. Using NetSquid, simulation tool based on discrete events, we assess benchmark performance of such linking distant locations in Europe terms key distribution rates, considering realistic parameters currently available or near-term technology. Our results highlight limits current...
Quantum Key Distribution (QKD) enables secret key exchange between two remote parties with information-theoretic security rooted in the laws of quantum physics. Encoding information continuous variables (CV), such as values quadrature components coherent states light, brings implementations much closer to standard optical communication systems, but this comes at price significant complexity digital signal processing techniques required for operation low signal-to-noise ratios. In work, we...
Future quantum communication infrastructures will rely on both terrestrial and space-based links integrating high-performance optical systems engineered for this purpose. In downlinks in particular, the loss budget variations signal propagation due to atmospheric turbulence effects impose a careful optimization of coupling light single-mode fibers required interfacing with receiving stations ground networks. work, we perform comprehensive study role adaptive optics (AO) optimization,...
Free-space optical communication systems always require a precise focusing at the receiver. Unfortunately, when transmitted beam passes through atmosphere wavefront is distorted by time variant inhomogeneity of refractive index, causing strong fluctuations in power coupled into single-mode fiber We present an transmission system with Multi-Actuator Lens (MAL) capable to increase coupling efficiency from about 5% absence correction 20%. The measurements have been performed indoor artificially...
We present a highly modular Open Source Software to perform CV-QKD experiments. The software is hardware agnostic and was benchmarked on bulk integrated receivers, reaching state of the art secret key rates.
Future quantum networks will be composed of both terrestrial links for metropolitan and continent-scale connections space-based global coverage infrastructure resilience. However, the propagation signals through atmosphere is severely impacted by effects turbulence. This even more case entanglement-based communication protocols requiring two free-space channels to considered simultaneously. In this work, we assess advantage turbulence mitigation adaptive optics, in particular during daytime...
We demonstrate the gain brought by adaptive optics for space-ground QKD links. Refined modeling of turbulence, and ,including finite-size effects, shows improvement several orders magnitude secret key rate.
An optical frequency modulation approach is adopted to reduce the impact of phase- OTDR interference fading. This validated by phase analysis results from train detection in a railway tunnel Paris.
We demonstrate the gain brought by adaptive optics for space-ground QKD links. Refined modeling of turbulence, and ,including finite-size effects, shows improvement several orders magnitude secret key rate.
We present and analyse an architecture for a European-scale quantum network using satellite links to connect Quantum Cities, which are metropolitan networks with minimal hardware requirements the end users. Using NetSquid, simulation tool based on discrete events, we assess benchmark performance of such linking distant locations in Europe terms key distribution rates, considering realistic parameters currently available or near-term technology. Our results highlight limits current...