Results 41 to 50 of about 2,360,364 (245)

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

All-day free-space quantum key distribution with thermal source towards quantum secure communications for unmanned vehicles

npj Quantum Information
Unmanned vehicles (UV) demand highly secure communication system with high-cost-effectiveness. Bypassing the use of quantum coherent source and active modulations, passive-state-preparation (PSP) continuous-variable quantum key distribution (CVQKD) with ...
Hanwen Yin, Peng Huang, Zehao Zhou, Tao Wang, Xueqin Jiang, Guihua Zeng   +5 more
doaj   +1 more source

Hyperuniform Disorder in Photonic Crystal Slabs With Intrinsic Non‐Hermiticity

Advanced Optical Materials, EarlyView.
Light propagation in photonic crystal slabs with imposed hyperuniform disorder is investigated theoretically and numerically. The hyperuniform disorder is imposed by varying the hole size. The photonic crystal is intrinsically non‐Hermitian due to radiative loss, with non‐Hermiticity appearing as a complex effective mass of a quadratic photonic band ...
Zeyu Zhang, Koorosh Sadri, Brian Gould, Mikael C. Rechtsman   +3 more
wiley   +1 more source

Continuous-variable quantum key distribution with a leakage from digital-to-analog conversion

npj Quantum Information
In the field of quantum communication, investigating the practical security of systems is conducive to their deployments in real-world scenarios. In this paper, we identify and experimentally demonstrate a side-channel vulnerability within continuous ...
Xu Liu, Jinghan Sun, Tao Wang, Peng Huang, Guihua Zeng   +4 more
doaj   +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

In situ upgrade of quantum simulators to universal computers [PDF]

, 2018
Quantum simulators, machines that can replicate the dynamics of quantum systems, are being built as useful devices and are seen as a stepping stone to universal quantum computers.
Benjamin Dive, Alexander Pitchford, Burgarth, Daniel, Florian Mintert, Daniel Burgarth, Dive, B, Mintert, Florian, Pitchford, Alexander   +7 more
core   +1 more source

Transparent Single‐Dye NIR Photonic Platform for Multimodal Optical Authentication

Advanced Optical Materials, EarlyView.
A single‐component DHP‐SQ dye integrates visible transparency, near‐infrared (NIR) fluorescence, and photothermal functionality into one molecular platform. NIR‐selective visualization transforms visually imperceptible printed patterns into readily authenticated information, while screen‐printing compatibility enables well‐defined patterning on diverse
Su Jeong Choi, Seung Hyeon Kim, Dayoung Shin, Yeongnam Heo, Minseo Kim, Ji Hyeon Lee, Ji‐Eun Jeong, Young‐Jae Jin, Jin Chul Kim, Hyoung Eun Bae, Young Hoon Son, Sung Jin Park, Sang Hwan Nam, Young Il Park, Hyocheol Jung   +14 more
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

Quantum Machine Learning for Distributed Quantum Protocols with Local Operations and Noisy Classical Communications

Entropy, 2023
Distributed quantum information processing protocols such as quantum entanglement distillation and quantum state discrimination rely on local operations and classical communications (LOCC).
Hari Hara Suthan Chittoor, Osvaldo Simeone   +1 more
doaj   +1 more source

Quantum Antenna Theory for Secure Wireless Communications

, 2020
Outline of a proposed new research program in antenna theory, quantum optics, quantum communications.
Said Mikki (8138079)
core   +1 more source