Results 71 to 80 of about 94,977 (261)

On fast and slow Earth’s magnetospheric dynamics during geomagnetic storms: a stochastic Langevin approach

Journal of Space Weather and Space Climate, 2018
The Earth’s magnetosphere responds to the external changes of interplanetary magnetic field and solar wind conditions showing a multiscale dynamics, manifesting in the occurrence of fluctuations over a very wide range of timescales.
Alberti Tommaso, Consolini Giuseppe, De Michelis Paola, Laurenza Monica, Marcucci Maria Federica   +4 more
doaj   +1 more source

Non-Gaussian Velocity Distribution Function in a Vibrating Granular Bed

, 2004
The simulation of granular particles in a quasi two-dimensional container under the vertical vibration as an experimental accessible model for granular gases is performed.
Blair D. L., Brey J. J., Campbell C. S., Cundall P. A., Esipov S. E., Ichiki K., Isobe M., Jaeger H. M., Kawaguchi T., Kawaguchi T., Kawahara R., Losert W., Mitarai N., Moon S. J., Mueth D. M., Murayama Y., Nakanishi H., Olafsen J. S., Persson B. N., Pöshel T., Radjai F., Rouyer F., Taguchi Y-h., van Noije T. P. C., van Noije T. P. C., Warr S., Wildman R. D.   +26 more
core   +1 more source

Asymmetry of the Ferroelectric Phase Transition in BaTiO3

Advanced Materials, EarlyView.
Phase transitions are typically assumed to behave identically in forward and reverse. This work shows that in the ferroelectric material barium titanate this is not true: heating drives an abrupt, first‐order jump, while cooling gives a smooth, continuous change.
Asaf Hershkovitz, Elangovan Hemaprabha, Rajesh Mandal, Pravin Kavle, Jamil Tanus, Maya Barzilay, Ching‐Che Lin, David Spirito, Semën Gorfman, Bo Wang, Ignacio J. Villar‐García, Neus Domingo, Long‐Qing Chen, Lane W. Martin, Yachin Ivry   +14 more
wiley   +1 more source

Momentum-space Langevin dynamics of holographic Wilsonian RG flow: self-interacting massive scalar field with marginal deformation

European Physical Journal C: Particles and Fields
We explore the mathematical relationship between the holographic Wilsonian renormalization group (HWRG) and stochastic quantization(SQ) motivated by the similarity of the monotonicity in RG flow with Langevin dynamics of non-equilibrium thermodynamics ...
Ji-seong Chae, Jae-Hyuk Oh
doaj   +1 more source

Bottomonium continuous production from unequilibrium bottom quarks in ultrarelativistic heavy ion collisions

Physics Letters B, 2017
We employ the Langevin equation and Wigner function to describe the bottom quark dynamical evolutions and their formation into a bound state in the expanding Quark Gluon Plasma (QGP).
Baoyi Chen, Jiaxing Zhao
doaj   +1 more source

Brownian motion of Massive Particle in a Space with Curvature and Torsion and Crystals with Defects

, 1995
We develop a theory of Brownian motion of a massive particle, including the effects of inertia (Kramers' problem), in spaces with curvature and torsion.
Bilby B A, Cartan E, H Kleinert, Kleinert H, Kleinert H, Kleinert H, Kleinert H, Kondo K, Kröner E, S V Shabanov, Schouten J A, Zinn-Justin J   +11 more
core   +3 more sources

Short-time behavior of the correlation functions for the quantum Langevin equation

Physical Review A, 1996
We analyze the quantum Langevin equation obtained for the Ford-Kac-Mazur and related models. We study an explicit expression for the correlation function of the noise, obtained by making use of the normal-ordered product of operators. Such an expression is divergence-free, does not require any frequency cutoff, and yields the classical (Markoffian ...
Raffaella Blasi, Raffaella Blasi, Saverio Pascazio, Saverio Pascazio   +3 more
openaire   +4 more sources

Dynamic correlation functions and Boltzmann-Langevin approach for driven one-dimensional lattice gas [PDF]

Physical Review E, 2005
10 pages, 9 ...
Pierobon, Paolo, Parmeggiani, Andrea, Oppen, Felix von, Frey, Erwin   +3 more
openaire   +4 more sources

Role of the Recombination Zone in Organic Light‐Emitting Devices

Advanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

New classical brackets for dissipative systems

, 2003
A set of brackets for classical dissipative systems, subject to external random forces, are derived. The method is inspired to the old procedure found by Peierls, for deriving the canonical brackets of conservative systems, starting from an action ...
Bimonte, Cosimo Stornaiolo, DeWitt, Dütsch, Ford, Giampiero Esposito, Giuseppe Bimonte, Giuseppe Marmo, Marolf, Nelson, Peierls, Senitzky   +11 more
core   +1 more source