scholarly journals Diffraction symmetry of binary Fourier elements with feature sizes on the order of the illumination wavelength and effects of fabrication errors

2017 ◽  
Vol 42 (24) ◽  
pp. 5178 ◽  
Author(s):  
Giang-Nam Nguyen ◽  
Kevin Heggarty ◽  
Julien Le Meur ◽  
Andreas Bacher ◽  
Patrick Meyrueis
Keyword(s):  
Fabrication Errors ◽  
Illumination Wavelength

scholarly journals Generation and robustness of quantum entanglement in spin graphs

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jan Riegelmeyer ◽  
Dan Wignall ◽  
Marta P. Estarellas ◽  
Irene D’Amico ◽  
Timothy P. Spiller
Keyword(s):  
Quantum Information Processing ◽  
Bell State ◽  
Spin Chains ◽  
Coupling Scheme ◽  
High Fidelity ◽  
Coupling Ratio ◽  
Entanglement Generation ◽  
Fabrication Errors ◽  
Coupling Strengths ◽  
Hardware Platforms

AbstractEntanglement is a crucial resource for quantum information processing, and so protocols to generate high-fidelity entangled states on various hardware platforms are in demand. While spin chains have been extensively studied to generate entanglement, graph structures also have such potential; however, only a few classes of graphs have been explored for this specific task. In this paper, we apply a particular coupling scheme involving two different coupling strengths to a graph of two interconnected $$3\times 3$$ 3 × 3 square graphs such that it effectively contains three defects. We show how this structure allows generation of a Bell state whose fidelity depends on the chosen coupling ratio. We apply partitioned graph theory in order to reduce the dimension of the graph and show that, using a reduced graph or a reduced chain, we can still simulate the same protocol with identical dynamics. Finally, we investigate how fabrication errors affect the entanglement generation protocol and how the different equivalent structures are affected, finding that for some specific coupling ratios they are extremely robust.

scholarly journals Integrity Management of Marine Structures; With Emphasis on Design for Structural Robustness

2018 ◽  
Author(s):  
Torgeir Moan
Keyword(s):  
Structural Damage ◽  
Structural Integrity ◽  
Oil And Gas ◽  
Offshore Structures ◽  
Design Standards ◽  
Limit States ◽  
Fabrication Errors ◽  
Integrity Management ◽  
Operational Errors ◽  
And Control

Based on relevant accident experiences with oil and gas platforms, a brief overview of structural integrity management of offshore structures is given; including an account of adequate design criteria, inspection, repair and maintenance as well as quality assurance and control of the engineering processes. The focus is on developing research based design standards for Accidental Collapse Limit States to ensure robustness or damage tolerance in view damage caused by accidental loads due to operational errors and to some extent abnormal structural damage due to fabrication errors. Moreover, it is suggested to provide robustness in cases where the structural performance is sensitive to uncertain parameters. The use of risk assessment to aid decisions in lieu of uncertainties affecting the performance of novel and existing offshore structures, is briefly addressed.

scholarly journals HONO and NO<sub>2</sub> evolution from irradiated nitrate-doped ice and frozen nitrate solutions

2006 ◽  
Vol 6 (5) ◽  
pp. 10713-10731 ◽  
Author(s):  
T. Bartels-Rausch ◽  
D. J. Donaldson
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Water Surface ◽  
Wavelength Dependence ◽  
Surface Fluxes ◽  
Strong Temperature Dependence ◽  
Adsorption Processes ◽  
Illumination Wavelength ◽  
Monolayer Coverage ◽  
Nitrate Solutions

Abstract. Nitrate photolysis in the wavelength range 250–1200 nm was studied on ice in a controlled laboratory experiment. Monolayer coverage of nitrate was achieved by dosing well-known amounts of HNO3 from the gas phase onto a frozen water surface. Fluxes of HONO and NO2 into the gas phase with time were quantified at temperatures between 193 K and 258 K and as a function of illumination wavelength in the range: 250–345 nm. Whereas HONO release showed a strong temperature dependence at colder temperatures, attributed to reversible adsorption processes, NO2 fluxes were independent of temperature. The observed fluxes of HONO and NO2 at high temperature were not affected by diffusion or adsorption processes, and could be used to estimate a quantum yield for HONO formation of (3.8±0.6)×10−4. A different wavelength dependence for HONO and NO2 fluxes indicates that additional reactions besides nitrate photolysis and subsequent release of the products contribute to the emission of nitrogen oxides.

scholarly journals Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates

2018 ◽  
Vol 9 ◽  
pp. 216-223 ◽  
Author(s):  
Arnau Coll ◽  
Sandra Bermejo ◽  
David Hernández ◽  
Luís Castañer
Keyword(s):  
Three Dimensional ◽  
Optical Quality ◽  
High Optical Quality ◽  
Inverse Opals ◽  
Large Size ◽  
Fabrication Errors ◽  
Supporting Layer ◽  
Higher Temperature ◽  
Self Assembled ◽  
High Dielectric

The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% reflectivity peak at 798 nm having an area of 2 cm2 and a thickness of 17 µm are achieved using a sacrificial self-assembled structure of large thickness, which was produced with minimum fabrication errors by means of an electrospray technique. Using alumina as the first supporting layer enables the deposition of TiO2 at a higher temperature, therefore providing better optical quality.

A Z-Axis Decoupled Micromachined Gyroscope with Dual Frames

2011 ◽  
Vol 483 ◽  
pp. 169-173
Author(s):  
Hai Lin Tang ◽  
Xian Xue Liu ◽  
Hao Zhou
Keyword(s):  
Quality Factor ◽  
Test Results ◽  
Dual Frames ◽  
Fabrication Errors ◽  
Micromachined Gyroscope

A z-axis decoupled micromachined gyroscope with dual frames is designed, fabricated and tested. The robust structure considering fabrication errors is obtained by the use of optimal robustness of design and process compensation. The gyroscope is packaged in vacuum, and test results show that quality factor of driving and sensing modes are 2000 and 800, respectively. In the range of 0~2400 deg/sec, sensitivity and linearity of the fabricated gyroscope are 1 deg/sec and 0.3%, respectively.

Effect of clamping modes and fabrication errors on additional surface variation of KDP crystals

2012 ◽  
Vol 24 (9) ◽  
pp. 2079-2084 ◽  
Author(s):  
徐攀 Xu Pan ◽  
崔凯洪 Cui Kaihong ◽  
张彬 Zhang Bin ◽  
贾凯 Jia Kai ◽  
熊召 Xiong Zhao ◽  
...  
Keyword(s):  
Fabrication Errors ◽  
Surface Variation ◽  
Kdp Crystals

Quantum efficiency of the photo-induced electronic transfer in dye–TiO2 complexes

2018 ◽  
Vol 20 (41) ◽  
pp. 26280-26287
Author(s):  
Dalma M. Marquez ◽  
Cristián G. Sánchez
Keyword(s):  
Charge Transfer ◽  
Quantum Efficiency ◽  
Electronic Transfer ◽  
Illumination Wavelength

The quantum efficiency of charge transfer in a dye–titania complex is calculated as a function of illumination wavelength.

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