53 citations · 193 across the 15 of their papers we have counts for
15 papers
Spectral tuning of single T centres by the Stark effect
Michael Dobinson, Felix Hufnagel, Simon A. Meynell +8
Among the many solid-state emitters being explored for scalable quantum technologies, the silicon T centre is a leading candidate offering long-lived spin qubits, a telecommunicati…
Optimal Diffractive Focusing of Quantum Waves
Maxim A. Efremov, Felix Hufnagel, Hugo Larocque +2
Following the familiar analogy between the optical paraxial wave equation and the Schrödinger equation, we derive the optimal, real-valued wave function for focusing in one and two…
Fast Adaptive Optics for High-Dimensional Quantum Communications in Turbulent Channels
Lukas Scarfe, Felix Hufnagel, Manuel F. Ferrer-Garcia +3
Quantum Key Distribution (QKD) promises a provably secure method to transmit information from one party to another. Free-space QKD allows for this information to be sent over great…
High-Dimensional Quantum Certified Deletion
Felix Hufnagel, Anne Broadbent, Ebrahim Karimi
Certified deletion is a protocol which allows two parties to share information, from Alice to Bob, in such a way that if Bob chooses to delete the information, he can prove to Alic…
High-dimensional Encoding in the Round-Robin Differential-Phase-Shift Protocol
Mikka Stasiuk, Felix Hufnagel, Xiaoqin Gao +4
In quantum key distribution (QKD), protocols are tailored to adopt desirable experimental attributes, including high key rates, operation in high noise levels, and practical securi…
Manipulating the symmetry of transverse momentum entangled biphoton states
Xiaoqin Gao, Yingwen Zhang, Alessio D'Errico +3
Bell states are a fundamental resource in photonic quantum information processing. These states have been generated successfully in many photonic degrees of freedom. Their manipula…
Flat Magic Window
Felix Hufnagel, Alessio D'Errico, Hugo Larocque +3
Magic windows (or mirrors) consist of optical devices with a surface deformation or thickness distribution devised in such a way to form a desired image. The associated image inten…
Full-mode Characterisation of Correlated Photon Pairs Generated in Spontaneous Downconversion
Alessio D'Errico, Felix Hufnagel, Filippo Miatto +2
Spontaneous parametric downconversion is the primary source to generate entangled photon pairs in quantum photonics laboratories. Depending on the experimental design, the generate…
Underwater quantum communication over a 30-meter flume tank
Felix Hufnagel, Alicia Sit, Frédéric Bouchard +5
Underwater quantum communication has recently been explored using polarization and orbital angular momentum. Here, we show that spatially structured modes, e.g., a coherent superpo…
Characterization of an underwater channel for quantum communications in the Ottawa River
Felix Hufnagel, Alicia Sit, Florence Grenapin +8
We examine the propagation of optical beams possessing different polarization states and spatial modes through the Ottawa River in Canada. A Shack-Hartmann wavefront sensor is used…
Compressed sensing of twisted photons
F. Bouchard, D. Koutny, F. Hufnagel +8
The ability to completely characterize the state of a quantum system is an essential element for the emerging quantum technologies. Here, we present a compressed-sensing inspired m…
Adaptive compressive tomography with no a priori information
D. Ahn, Y. S. Teo, H. Jeong +8
Quantum state tomography is both a crucial component in the field of quantum information and computation, and a formidable task that requires an incogitably large number of measure…
Determining complementary properties using weak-measurement: uncertainty, predictability, and disturbance
G. S. Thekkadath, F. Hufnagel, J. S. Lundeen
It is often said that measuring a system's position must disturb the complementary property, momentum, by some minimum amount due to the Heisenberg uncertainty principle. Using a "…
Quantum process tomography of a high-dimensional quantum communication channel
Frédéric Bouchard, Felix Hufnagel, Dominik Koutný +5
The characterization of quantum processes, e.g. communication channels, is an essential ingredient for establishing quantum information systems. For quantum key distribution protoc…
Underwater Quantum Key Distribution in Outdoor Conditions with Twisted Photons
Frédéric Bouchard, Alicia Sit, Felix Hufnagel +8
Quantum communication has been successfully implemented in optical fibres and through free-space [1-3]. Fibre systems, though capable of fast key rates and low quantum bit error ra…