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Stimulated Parametric Down-Conversion: From Foundational Coherence to Structured Light Applications
M. F. Z. Arruda, M. G. Damaceno, G. H. dos Santos +4
Stimulated parametric down-conversion (StimPDC) is the seeded version of the process that underlies much of photonic quantum information. Replacing the vacuum at one input port wit…
Poled-fibre phase modulator for efficient high-dimensional quantum measurements
Nayda Guerrero, Nelson Villalba, Gustavo H. dos Santos +10
Efficient detection of quantum states underpins advanced device-independent quantum-information protocols that provide the ultimate level of security for tasks including quantum ra…
Optimal Interaction Free Localization with Multipath Interferometers
Anubhav Chaturvedi, Jorge Escandón-Monardes, Esteban S. Gómez +2
Interaction-free measurement (IFM) certifies the presence of an absorbing object without a photon ever being absorbed by it. When several candidate locations are available, existin…
Coincidence free certification and quantification of spatial entanglement with stimulated parametric down conversion
M. G. Damaceno, G. H. dos Santos, N. Rubiano da Silva +2
Using stimulated emission, a photon pair source can be characterized by seeding the signal mode with a bright classical beam and measuring the stimulated idler field, thus replacin…
Twisted Gaussian Schell States in Quantum Optics: Twist-Assisted Nonclassicality and Entanglement
Fabricio Toscano, G. Cañas, A. Z. Khoury +2
We introduce the Twisted Gaussian Schell (TGS) state, a two-mode mixed Gaussian state defined as the quantum-optical analog of the Twisted Gaussian Schell-model beam of classical p…
High-Dimensional Quantum Key Distribution via full Core-mode Encoding over Deployed Multicore Fibers
G. H. dos Santos, K. B. Sawada, N. Villalba +11
Quantum key distribution (QKD) provides information-theoretic security rooted in quantum physics, while high-dimensional (HD) encoding increases both noise tolerance and secret-key…