Results 81 to 90 of about 17,173,630 (326)

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

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

Unveiling Ultrafast Spin‐Valley Dynamics and Phonon‐Mediated Charge Transfer in MoSe2/WSe2 Heterostructures

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This study reveals the potential to manipulate spin‐valley polarization dynamics in MoSe2/WSe2 heterostructures by quantifying different scattering processes following selective photoexcitation. The results show that these heterostructures enable ultrafast valley‐selective charge transfer, with phonon scattering playing a significant role in the ...
Julian Wagner, Robin Bernhardt, Lukas Rieland, Omar Abdul‐Aziz, Qiuyang Li, Xiaoyang Zhu, Stefano Dal Conte, Giulio Cerullo, Paul H. M. van Loosdrecht, Hamoon Hedayat   +9 more
wiley   +1 more source

Magnetic Engine for the Single-Particle Landau Problem

Entropy, 2017
We study the effect of the degeneracy factor in the energy levels of the well-known Landau problem for a magnetic engine. The scheme of the cycle is composed of two adiabatic processes and two isomagnetic processes, driven by a quasi-static modulation of
Francisco J. Peña, Alejandro González, Alvaro S. Nunez, Pedro A. Orellana, René G. Rojas, Patricio Vargas   +5 more
doaj   +1 more source

The Role of Theoretical Calculations for INVEST Systems: Complementarity Between Theory and Experiments and Rationalization of the Results

Advanced Optical Materials, EarlyView.
Theoretical lessons are key for molecules presenting an inverted singlet‐triplet excited state (e.g. S1 and T1) energy difference. This perspective provides a snapshot of the role played by calculations in last years, not only to anticipate experimental findings but also for driving high‐throughput virtual screenings, as well as the main challenge to ...
Ángel José Pérez‐Jiménez, Yoann Olivier, Juan Carlos Sancho‐García   +2 more
wiley   +1 more source

Adiabaticity impact on hydrogen purification and recovery by pressure swing from binary mixture containing hydrogen and carbon dioxide

Chemical Engineering Journal Advances, 2023
Hydrogen purification by conventional adiabatic cylindrical column and non-adiabatic plate pressure swing adsorption (NAPSA) mediated by amorphous spent coffee grounds was investigated to study the impact of the two systems on hydrogen purity and ...
Hind Jihad Kadhim Shabbani, Ammar Ali Abd, Jinsoo Kim, Zuchra Helwani, Mohd Roslee Othman   +4 more
doaj  

The Impact of Donor‐Orientation on the Emission Properties of Chlorinated Trityl Radicals

Advanced Optical Materials, EarlyView.
Chlorinated trityl radicals with electron‐donating groups enable efficient red emission for optoelectronics. Donor orientation and steric constraints regulate vibronic coupling, influencing luminescence. A novel trityl derivative with restricted donor alignment minimizes non‐radiative decay, enhancing quantum yield.
Mona E. Arnold, Robert Toews, Lars Schneider, Jonas Schmid, Miftahussurur Hamidi Putra, Michael Busch, Axel Groß, Felix Deschler, Andreas Köhn, Alexander J. C. Kuehne   +9 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

Curcuminoid Derivatives with a Donor‐Acceptor‐Donor Architecture: an Outstanding Platform for Highly‐Efficient Near‐Infrared Electroluminescence and Amplified Spontaneous Emission

Advanced Optical Materials, EarlyView.
Curcuminoid boron difluoride dyes containing triphenylamine units are prepared and their photophysical and electrochemical properties are investigated. These new light‐emitting dyes are used in organic light‐emitting diodes (OLEDs) emitting at 800 nm with 1% external quantum efficiency, and show low threshold amplified spontaneous emission in thin ...
Anthony D'Aléo, Xun Tang, Dae‐Hyeon Kim, Danillo Valverde, Elena Zaborova, Gabriel Canard, Arnaud Brosseau, Loïc Mager, Gilles Clavier, Chihaya Adachi, Yoann Olivier, Jean‐Charles Ribierre   +11 more
wiley   +1 more source

Shortcuts to adiabaticity using flow fields

New Journal of Physics, 2017
A shortcut to adiabaticity is a recipe for generating adiabatic evolution at an arbitrary pace. Shortcuts have been developed for quantum, classical and (most recently) stochastic dynamics. A shortcut might involve a counterdiabatic (CD) Hamiltonian that
Ayoti Patra, Christopher Jarzynski
doaj   +1 more source