Results 81 to 90 of about 178,933 (313)

Nonreciprocal Spin Waves in Nanoscale Hybrid Néel–Bloch–Néel Domain Walls Detected by Scanning X‐Ray Microscopy in Perpendicular Magnetic Anisotropic Fe/Gd Multilayers

Advanced Materials, EarlyView.
Using scanning transmission X‐ray microscopy, nonreciprocal spin‐wave behavior is revealed in real space in Fe/Gd multilayers with perpendicular magnetic anisotropy, highlighting their functionality for magnonic logic circuits operating at GHz frequencies.
Ping Che, Axel J. M. Deenen, Andrea Mucchietto, Joachim Gräfe, Michael Heigl, Korbinian Baumgaertl, Markus Weigand, Michael Bechtel, Sabri Koraltan, Gisela Schütz, Dieter Suess, Manfred Albrecht, Dirk Grundler   +12 more
wiley   +1 more source

Shortcuts to quantum adiabatic processes

Journal of Physics: Conference Series, 2011
We review different ways to accelerate adiabatic processes in cold atom physics and atomic state preparation. Trap expansions or contractions and atomic transport may be accelerated by an invariant-based inverse engineering approach. Berry's inverse engineering method is also applied to produce fast versions of adiabatic passage methods.
Xi Chen, Xi Chen, S. Ibáñez, E. Torrontegui, Andreas Ruschhaupt, J. G. Muga, I. Lizuain   +6 more
openaire   +2 more sources

Adiabatic processes need not correspond to optimal work [PDF]

Physica E: Low-dimensional Systems and Nanostructures, 2005
The minimum work principle states that work done on a thermally isolated equilibrium system is minimal for the adiabatically slow (reversible) realization of a given process. This principle, one of the formulations of the second law, is studied here for finite (possibly large) quantum systems interacting with macroscopic sources of work. It is shown to
Allahverdyan, A., Nieuwenhuizen, T.M.
openaire   +4 more sources

Airbrushing: A Novel Method for Preparation of High‐Emissivity Black Coating for Infrared Measurements

Advanced Materials Interfaces, EarlyView.
This study showcases the airbrush method, a novel coating technique for the preparation of thin black paint coatings for infrared camera measurements. Using the method, coatings with an emissivity of 0.95, and as thin as 3 µm can be prepared. The method is affordable, non‐destructive, and can be prepared onto a wide range of substrates while ...
Victor Regis, Geoff Brennecka, Urban Tomc, Andrej Kitanovski, Jan Cerar, Jaka Tušek, Ivan Jerman, Enric Stern‐Taulats, Klara Lünser, Lluís Mañosa, Hana Uršič   +10 more
wiley   +1 more source

Advanced Optical Integration Processes for Photonic‐Integrated Circuit Packaging

Advanced Materials Technologies, EarlyView.
Photonic integrated chip packaging is a growing technology that helps make devices faster, more efficient, and more compact by using light instead of electricity. This review highlights recent progress in making these chips work better at different levels, discusses current challenges like heat and alignment, and looks at future possibilities for ...
Keuntae Baek, Minhyeok Kim, Hak‐Sung Kim, Jinho Ahn, Hongyun So   +4 more
wiley   +1 more source

Fast driving between arbitrary states of a quantum particle by trap deformation

, 2016
By performing a slow adiabatic change between two traps of a quantum particle, it is possible to transform an eigenstate of the original trap into the corresponding eigenstate of the final trap. If no level crossings are involved, the process can be made
Guéry-Odelin, D., Martínez-Garaot, S., Muga, J. G., Palmero, M.   +3 more
core   +3 more sources

Geometric orbital magnetization in adiabatic processes

Physical Review B, 2019
We consider periodic adiabatic processes of gapped many-body spinless electrons. We find an additional contribution to the orbital magnetization due to the adiabatic time evolution, dubbed \textit{geometric} orbital magnetization, which can be expressed as derivative of the many-body Berry phase with respect to an external magnetic field.
Seishiro Ono, Luka Trifunovic, Haruki Watanabe   +2 more
openaire   +4 more sources

How to Manufacture Photonic Metamaterials

Advanced Materials Technologies, EarlyView.
Metamaterials boast applications such as invisibility and “hyperlenses” with resolution beyond the diffraction limit, but these applications haven’t been exploited in earnest and the market for them hasn’t grown much likely because facile and economical methods for fabricating them without defect has not emerged.
Apurba Paul, Gregory Timp
wiley   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Effect of Temperature, Time, and Material Thickness on the Dehydration Process of Tomato

International Journal of Food Science, 2015
This study aimed to evaluate the effects of temperature, time, and thickness of tomatoes fruits during adiabatic drying process. Dehydration, a simple and inexpensive process compared to other conservation methods, is widely used in the food industry in ...
A. F. K. Correia, A. C. Loro, S. Zanatta, M. H. F. Spoto, T. M. F. S. Vieira   +4 more
doaj   +1 more source