Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Hufnagel, Felix"'
Following the familiar analogy between the optical paraxial wave equation and the Schr\"odinger equation, we derive the optimal, real-valued wave function for focusing in one and two space dimensions without the use of any phase component. We compare
Externí odkaz:
http://arxiv.org/abs/2406.13545
Autor:
Scarfe, Lukas, Hufnagel, Felix, Ferrer-Garcia, Manuel F., D'Errico, Alessio, Heshami, Khabat, Karimi, Ebrahim
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 distances and in places where fibre-based communications cannot be im
Externí odkaz:
http://arxiv.org/abs/2311.13041
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 Alice that the deletion has taken place by providing a verification key. I
Externí odkaz:
http://arxiv.org/abs/2304.03397
Autor:
Stasiuk, Mikka, Hufnagel, Felix, Gao, Xiaoqin, Goldberg, Aaron Z., Bouchard, Frédéric, Karimi, Ebrahim, Heshami, Khabat
Publikováno v:
Quantum 7, 1207 (2023)
In quantum key distribution (QKD), protocols are tailored to adopt desirable experimental attributes, including high key rates, operation in high noise levels, and practical security considerations. The round-robin differential phase shift protocol (
Externí odkaz:
http://arxiv.org/abs/2302.07888
Autor:
Gao, Xiaoqin, Zhang, Yingwen, D'Errico, Alessio, Hufnagel, Felix, Heshami, Khabat, Karimi, Ebrahim
Publikováno v:
Optics Express, 30(12) 21276 (2022)
Bell states are a fundamental resource in photonic quantum information processing. These states have been generated successfully in many photonic degrees of freedom. Their manipulation, however, in the momentum space remains challenging. Here, we pre
Externí odkaz:
http://arxiv.org/abs/2203.06260
Autor:
Hufnagel, Felix, D'Errico, Alessio, Larocque, Hugo, Alsaiari, Fatimah, Upham, Jeremy, Karimi, Ebrahim
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 intensity distribution has been shown to be related to the Laplacian of the
Externí odkaz:
http://arxiv.org/abs/2112.07053
Spontaneous parametric downconversion is the primary source to generate entangled photon pairs in quantum photonics laboratories. Depending on the experimental design, the generated photon pairs can be correlated in the frequency spectrum, polarisati
Externí odkaz:
http://arxiv.org/abs/2103.08689
Autor:
Hufnagel, Felix, Sit, Alicia, Bouchard, Frédéric, Zhang, Yingwen, England, Duncan, Heshami, Khabat, Sussman, Benjamin J., Karimi, Ebrahim
Underwater quantum communication has recently been explored using polarization and orbital angular momentum. Here, we show that spatially structured modes, e.g., a coherent superposition of beams carrying both polarization and orbital angular momentu
Externí odkaz:
http://arxiv.org/abs/2004.04821
Autor:
Hufnagel, Felix, Sit, Alicia, Grenapin, Florence, Bouchard, Frédéric, Heshami, Khabat, England, Duncan, Zhang, Yingwen, Sussman, Benjamin J., Boyd, Robert W., Leuchs, Gerd, Karimi, Ebrahim
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 to record the distorted beam's wavefront. The turbulence in the under
Externí odkaz:
http://arxiv.org/abs/1905.09437
Autor:
Bouchard, Frédéric, Hufnagel, Felix, Koutný, Dominik, Abbas, Aazad, Sit, Alicia, Heshami, Khabat, Fickler, Robert, Karimi, Ebrahim
Publikováno v:
Quantum 3, 138 (2019)
The characterization of quantum processes, e.g. communication channels, is an essential ingredient for establishing quantum information systems. For quantum key distribution protocols, the amount of overall noise in the channel determines the rate at
Externí odkaz:
http://arxiv.org/abs/1806.08018