Results 81 to 90 of about 180,621 (313)

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

Adsorption and Separation by Flexible MOFs

Advanced Materials, EarlyView.
Flexible metal–organic frameworks (MOFs) present significant potential for gas storage and separation due to their structural dynamic. This review explores the rationale behind the flexible MOFs' enhanced working capacity and separation factors. It also addresses key challenges, including phase transition kinetics, crystal robustness, cycling, shaping,
Irena Senkovska, Volodymyr Bon, Antonia Mosberger, Yutong Wang, Stefan Kaskel   +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

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

Decoupling Transport of Salt Ions and Water in Hierarchically Structured Hydrogel for High Salinity Desalination

Advanced Materials, EarlyView.
A hierarchically structured hydrogel evaporator enables controlled decoupling of salt‐ion and water transport pathways for efficient solar desalination in hypersaline environments. Engineered radial and vertical channels direct salt away from the evaporative interface, enhancing water evaporation and ambient energy harvesting via a cold‐surface effect.
Yihan Shi, Xin Stella Zhang, Jiaqi Zhang, Shudi Mao, Casey Onggowarsito, An Feng, Wei Wei, Yuhan Huang, Qiang Fu   +8 more
wiley   +1 more source

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

Light‐Activated Micromotors in Air Propelled by Thermal Convection

Advanced Materials, EarlyView.
Near‐infrared‐driven micromotors in air can overcome gravity and generate convective motion by a light‐induced thermal mechanism driven by a temperature gradient in the air caused by the interaction of the gold nanoparticles present on the surface of ZnO and NIR irradiation.
Pedro Mena‐Giraldo, Gabrielle A. Mandl, Victor Quezada‐Novoa, Camilo Garcia‐Henao, Nicolas Bondon, Melanie Jane Hazlett, John A. Capobianco   +6 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

Ultrasound attenuation dependence on air compression or expansion processes [PDF]

, 2010
In this work variation of ultrasonic attenuation coefficient is analyzed in terms of air compression or expansion processes. In\ud closed spaces changing air volume, the ultrasound attenuation coefficient depends on thermodynamic processes which occur ...
Demcenko, A., Jakevicius, L., Mardosaite, R.   +2 more
core   +3 more sources

Perovskite Microwires for Room Temperature Exciton‐Polariton Neural Network

Advanced Materials, EarlyView.
Exciton‐polaritons are explored as a novel platform for optical neuromorphic computing at room temperature using a monocrystalline perovskite waveguide. Demonstrating non‐equilibrium Bose‐Einstein condensation, this work achieves machine learning tasks such as classification and object detection, marking a key advance toward energy‐efficient, practical
Andrzej Opala, Krzysztof Tyszka, Mateusz Kędziora, Magdalena Furman, Amir Rahmani, Stanisław Świerczewski, Marek Ekielski, Anna Szerling, Michał Matuszewski, Barbara Piętka   +9 more
wiley   +1 more source