Results 11 to 20 of about 5,543,577 (334)

Planar Offset Short Applicable to the Calibration of a Free-Space Material Measurement System in W-Band [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2021
The electrical properties of materials and their dependence on frequency and temperature are indispensable in designing electromagnetic devices and systems in various areas of engineering and science for both basic and applied researches.
Jin-Seob Kang, Jeong-Hwan Kim
doaj   +1 more source

Multi-channel free space optical convolutions [PDF]

open access: yesEPJ Web of Conferences, 2023
Convolutional layers are a critical feature of modern neural networks and require significant com-putational resources. In response, optical accelerators have been developed as a low-energy, high-bandwidth approach for performing large-scale convolutions.
Song Alexander   +2 more
doaj   +1 more source

Influence of Source Parameters on the Polarization Properties of Beams for Practical Free-Space Quantum Key Distribution

open access: yesEntropy, 2021
Polarization encoding has been extensively used in quantum key distribution (QKD) implementations along free-space links. However, the calculation model to characterize channel transmittance and quantum bit error rate (QBER) for free-space QKD has not ...
Tianyi Wu   +7 more
doaj   +1 more source

Free spaces [PDF]

open access: yesFundamenta Mathematicae, 2000
Free spaces in the context of the maps with hereditarily indecomposable fibers are considered. Answering questions of Krasinkiewicz it is proved that cones, polyhedra, Menger manifolds and some others are free.
Song, Jianwei, Tymchatyn, E. D.
openaire   +2 more sources

Adaptive Continuous-Variable Quantum Key Distribution with Discrete Modulation Regulative in Free Space

open access: yesMathematics, 2022
The finite sampling bandwidth of an analog-to-digital converter has a negative effect on the continuous-variable quantum key distribution (CVQKD), which leaves a potential loophole for an eavesdropper and weakens the practical security of the system.
Yiwu Zhu   +4 more
doaj   +1 more source

The phase shift induced by a single atom in free space [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2013
In this article we theoretically study the phase shift a single atom imprints onto a coherent state light beam in free space. The calculations are performed in a semiclassical framework.
Sondermann M., Leuchs G.
doaj   +1 more source

Free-Space Quantum Teleportation with Orbital Angular Momentum Multiplexed Continuous Variable Entanglement

open access: yesMathematics, 2023
Quantum teleportation is one of the fundamental primitives of quantum cryptography. In order to achieve a wider range of high-capacity information transfer, we propose a free-space quantum teleportation (QT) protocol with orbital angular momentum (OAM ...
Xinchao Ruan   +6 more
doaj   +1 more source

Lipschitz-Free Spaces Over Ultrametric Spaces [PDF]

open access: yesMediterranean Journal of Mathematics, 2015
The only change in the latest version is the second author's grant information. Question 1 from the previous version has been answered - see Remark 15 for the solution. Preprint was accepted in Mediterr.
Cúth, Marek, Doucha, Michal
openaire   +2 more sources

Inverse‐Design Methodology for Generating Twisted Ultrasonic Motor in Free Space

open access: yesAdvanced Intelligent Systems, 2023
A new level of freedom is made possible by orbital angular momentum (OAM), which can be used to create twisted ultrasonic motors for particle manipulation and control.
Chuanxin Zhang   +3 more
doaj   +1 more source

Free-Space Quasi-Phase Matching

open access: yes2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2022
A new approach to the quasi-phase matching of nonlinear materials based on the free space multipass cells is presented. The method is applicable to all types of nonlinear crystals with non-zero susceptibility χ(2).
Nazar Kovalenko   +3 more
openaire   +3 more sources

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