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Looking Beyond Visibility: Resolving the Temporal Structure of Continuous-Wave Four-Photon Hong-Ou-Mandel Interference
Sabine Häussler, Meritxell Cabrejo-Ponce, Ana Maria Torres +3
Hong-Ou-Mandel interference underpins many photonic quantum information protocols and is commonly characterized by a single visibility parameter. This quantity is typically obtaine…
Alternating Squeezing and Photon Subtraction for Optical Cat-State Generation
Johanna Conrad, Fabian Steinlechner, René Sondenheimer
Schrödinger cat states are important non-Gaussian resources for quantum information processing and quantum-enhanced metrology. Although photon subtraction from squeezed vacuum stat…
Secure Medical Data Transmission Using Quantum Key Distribution and Post-Quantum Cryptography in Real-World Fiber Networks
Vasile-Laurentiu Dosan, Paul Spooren, Sebastian Moeckel +12
The threat quantum computers pose to classical public-key cryptography motivates the deployment of quantum-safe communication for critical infrastructure such as healthcare, financ…
Mode-selective nonlinear interference for high-brightness and high-purity fiber-coupled SPDC sources
Carlos Sevilla-Gutiérrez, Purujit Singh Chauhan, Varun Raj Kaipalath +1
Single-mode-fiber-coupled spontaneous parametric down-conversion (SPDC) sources are a key resource for photonic quantum technologies, but in single-crystal geometries brightness, h…
Self-stabilized high-dimensional quantum key distribution on a metropolitan free-space link
Karolina Dziwulska, Christopher Spiess, Sarika Mishra +3
Quantum communication technologies capable of operating reliably across heterogeneous optical channels are essential for scalable metropolitan quantum networks. Here we demonstrate…
Asynchronous Multi-photon Interference for Quantum Networks
Baghdasar Baghdasaryan, Karen Lozano-Méndez, Markus Leipe +11
Advanced quantum communication protocols require high-visibility quantum interference between photons generated at distant nodes, which places stringent demands on optical synchron…