Results 1 to 10 of about 711 (259)

On the Simplification of Statistical Mechanics for Space Plasmas [PDF]

open access: yesEntropy, 2017
Space plasmas are frequently described by kappa distributions. Non-extensive statistical mechanics involves the maximization of the Tsallis entropic form under the constraints of canonical ensemble, considering also a dyadic formalism between the ...
George Livadiotis
doaj   +5 more sources

Derivation of the entropic formula for the statistical mechanics of space plasmas [PDF]

open access: yesNonlinear Processes in Geophysics, 2018
Kappa distributions describe velocities and energies of plasma populations in space plasmas. The statistical origin of these distributions is associated with the framework of nonextensive statistical mechanics.
G. Livadiotis
doaj   +7 more sources

Evaluating the Adiabatic Invariants in Magnetized Plasmas Using a Classical Ehrenfest Theorem [PDF]

open access: yesEntropy, 2023
In this article, we address the reliance on probability density functions to obtain macroscopic properties in systems with multiple degrees of freedom as plasmas, and the limitations of expensive techniques for solving Equations such as Vlasov’s.
Abiam Tamburrini   +2 more
doaj   +3 more sources

Kappa Distributions: Statistical Physics and Thermodynamics of Space and Astrophysical Plasmas

open access: yesUniverse, 2018
Kappa distributions received impetus as they provide efficient modelling of the observed particle distributions in space and astrophysical plasmas throughout the heliosphere.
George Livadiotis
doaj   +4 more sources

Statistical Mechanics where Newton’s Third Law is Broken [PDF]

open access: yesPhysical Review X, 2015
There is a variety of situations in which Newton’s third law is violated. Generally, the action-reaction symmetry can be broken for mesoscopic particles, when their effective interactions are mediated by a nonequilibrium environment. Here, we investigate
A. V. Ivlev   +5 more
doaj   +2 more sources

Evidence of Large-Scale Quantization in Space Plasmas

open access: yesEntropy, 2013
In plasmas, Debye screening structures the possible correlations between particles. We identify a phase space minimum h* in non-equilibrium space plasmas that connects the energy of particles in a Debye sphere to an equivalent wave frequency.
George Livadiotis, David J. McComas
doaj   +2 more sources

Super Transition Arrays: A Tool for Studying Spectral Properties of Hot Plasmas

open access: yesPlasma, 2021
For the theoretical study of X and extreme-UV spectra of ions in plasmas, quantum mechanics brings more detailed results than statistical physics. However, it is impossible to handle individually the billions of levels that must be taken into account in ...
Jean-Christophe Pain
doaj   +2 more sources

STATISTICAL MECHANICS OF DENSE PLASMAS : ASTROPHYSICAL APPLICATIONS

open access: yesLe Journal de Physique Colloques, 1978
La partie centrale de masse peu élevée des étoiles de la série principale consiste en mélanges plasmatiques de densité moyenne à fort couplage qui se prêtent bien à des simulations par la méthode Monte Carlo incorporant l'effet d'écran électronique ...
H. E. DEWITT
core   +3 more sources

Statistical mechanics of dense plasmas and implications for the plasma polarization shift [PDF]

open access: yes, 1984
A brief description of the statistical mechanics of reacting, dense, plasmas is given. The results do not support a Debye-like polarization shift at low density.
Rogers, F. J.
core   +2 more sources

Statistical mechanics of dense plasmas: numerical simulation and theory [PDF]

open access: yesLe Journal de Physique Colloques, 1977
Recent Monte Carlo calculations from Paris and from Livermore for dense one and two component plasmas have led to systematic and accurate results for the thermodynamic properties of dense Coulombic fluids.
DeWitt, H.E., H. E. DEWITT
core   +2 more sources

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