Results 41 to 50 of about 283,387 (277)

Quantum Communications

Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF), 2018
Quantum Communication is the art of transferring an unknown quantum state from one location, Alice, to a distant one, Bob. This is a non-trivial task because of the quantum no-cloning theorem which prevents one from merely using only classical means.
openaire   +2 more sources

Discrete-Modulated Coherent-State Quantum Key Distribution with Basis-Encoding

Research
Discrete-modulated coherent-state continuous-variable quantum key distribution (DMCS-CVQKD) is of great value for its simple implementation. However, the traditional DMCS-CVQKD scheme cannot tolerate the high channel excess noise and channel loss ...
Mingxuan Guo, Peng Huang, Le Huang, Xiaojuan Liao, Xueqin Jiang, Tao Wang, Guihua Zeng   +6 more
doaj   +1 more source

Robustness of bipartite Gaussian entangled beams propagating in lossy channels

, 2010
Subtle quantum properties offer exciting new prospects in optical communications. Quantum entanglement enables the secure exchange of cryptographic keys and the distribution of quantum information by teleportation. Entangled bright beams of light attract
Barbosa, F. A. S., Cassemiro, K. N., Coelho, A. S., de Faria, A. J., Martinelli, M., Nussenzveig, P., Villar, A. S.   +6 more
core   +1 more source

Quantum Cryptography

, 1995
Quantum cryptography is a new method for secret communications offering the ultimate security assurance of the inviolability of a Law of Nature.
Bell J. S., Brassard G., Busch P., Clauser J. F., Conan Doyle A., D. M. Alde, Deutsch D., G. G. Luther, G. L. Morgan, Hayes B., Hodges A., Hughes R. I. G., Kahn D., Knuth D. E., Lamphere R. J., M. Schauer, P. Dyer, Richard J. Hughes, Schneier B., Schroeder M. R., Shannon C. E., Shor P. W., Simmons G. J., Vernam G. S., von Neumann J., von Neumann J., Walker N. G., Welsh D., Williams R. C., Wright P., Wrixon F. B.   +30 more
core   +1 more source

Performance Analysis of an Optical System for FSO Communications Utilizing Combined Stochastic Gradient Descent Optimization Algorithm

Applied System Innovation
Wavefront aberrations caused by thermal flows or arising from the quality of optical components can significantly impair wireless communication links. Such aberrations may result in an increased error rate in the received signal, leading to data loss in ...
Ilya Galaktionov, Vladimir Toporovsky
doaj   +1 more source

CubeSat quantum communications mission

EPJ Quantum Technology, 2017
Quantum communication is a prime space technology application and offers near-term possibilities for long-distance quantum key distribution (QKD) and experimental tests of quantum entanglement.
Daniel KL Oi, Alex Ling, Giuseppe Vallone, Paolo Villoresi, Steve Greenland, Emma Kerr, Malcolm Macdonald, Harald Weinfurter, Hans Kuiper, Edoardo Charbon, Rupert Ursin   +10 more
doaj   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

Advanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

A Multi-Stage Algorithm of Fringe Map Reconstruction for Fiber-End Surface Analysis and Non-Phase-Shifting Interferometry

Applied System Innovation
Interferometers are essential tools for quality control of optical surfaces. While interferometric techniques like phase-shifting interferometry offer high accuracy, they involve complex setups, require stringent calibration, and are sensitive to phase ...
Ilya Galaktionov, Vladimir Toporovsky
doaj   +1 more source

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

Mathematics, 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, Lei Mao, Hui Hu, Yijun Wang, Ying Guo   +4 more
doaj   +1 more source

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source