Results 91 to 100 of about 178,933 (313)
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 +5 more
doaj +1 more source
Investigation of Exothermic Behaviors of Energetic Particles in Microfluidics Channels
Advanced Materials Technologies, EarlyView.Scheme and representative frames of delivery, ignition, and combustion process of core@shell Al@CuO energetic material in a microchannel. The electrical discharge occurred at the throat of microchannel leads to the combustion of the energetic reaction, causing the formation of high‐momentum butterfly‐shaped jet at the throat.
Alex Baranovsky +4 more
wiley +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. +2 more
core +3 more sources
Particle creation and particle number in an expanding universe
, 2012 I describe the logical basis of the method that I developed in 1962 and 1963 to define a quantum operator corresponding to the observable particle number of a quantized free scalar field in a spatially-flat isotropically expanding (and/or contracting ...
Parker, Leonard
core +1 more source
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 +9 more
wiley +1 more source
Quantifying adiabatic motion in the outer radiation belt and ring current with invariant matching
Frontiers in Astronomy and Space SciencesAdiabatic motion is a fundamental reversible process for geomagnetically trapped particle populations, including particles comprising the ring current and radiation belts.
D. E. da Silva +3 more
doaj +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
Defect Formation Preempts Dynamical Symmetry Breaking in Closed Quantum Systems
, 2011 We show that no matter how slowly a quantum-to-classical symmetry breaking process is driven, the adiabatic limit can never be reached in a macroscopic body.
Brink, Jeroen van den +2 more
core +1 more source
Advanced Optical Materials, EarlyView.A unique regioselective interior/exterior borylation strategy is presented for the one‐shot synthesis of two distinct organoboron luminophores from a common macrocyclic azacalix[3]arene. This interior/exterior borylation imparts the material with remarkable TADF properties and narrowband emission capabilities, spanning the violet to blue spectral ...
Sudhir K. Keshri +2 more
wiley +1 more source
A simple analytical model for dark matter halo structure and adiabatic contraction
, 2006 A simple analytical model for describing inner parts of dark matter halo is considered. It is assumed that dark matter density is power-law. The model deals with dark matter distribution function in phase space of adiabatic invariants (radial action and ...
A. V. Gurevich +22 more
core +1 more source