PHYSICS: FINDINGS FROM H.B. NERSISYAN AND CO-AUTHORS BROADEN UNDERSTANDING OF PHYSICS
Science Letter
August 5, 2008
According to recent research published in the journal Physical
Review E, "The electric microfield distribution (MFD) at a neutral
point is studied for two-component (TCP) electron-ion plasmas using
molecular-dynamics simulation and theoretical models. The particles are
treated within classical statistical mechanics, using an electron-ion
Coulomb potential regularized at distances less than the de Broglie
length to take into account quantum-diffraction effects."
"Corrections to the potential-of-mean-force exponential (PMFEX)
approximation recently proposed for the MFD at an impurity ion in a
strongly coupled TCP [Nersisyan et al., Phys. Rev. E 72, 036403 (2005)]
are obtained and discussed. This has been done by a generalization
of the standard Baranger-Mozer and renormalized cluster expansion
techniques originally developed for the one-component plasmas to the
TCPs. The results from this theoretical model are compared with those
from molecular-dynamics simulations. In particular, for a strongly
coupled TCP with an ionic charge Z> 5 the agreement with numerical
simulations is excellent," wrote H.B. Nersisyan and colleagues (see
also Physics).
The researchers concluded: "For still increasing coupling we
furthermore found that the PMFEX scheme becomes insufficient to
predict the MFD at a neutral point, while its improved version quite
well agrees with the simulations."
Nersisyan and colleagues published their study in Physical Review E
(Renormalized cluster expansion of the microfield distribution in
strongly coupled two-component plasmas. Physical Review E, 2008;77(5
Part 2):6409).
For additional information, contact H.B. Nersisyan, Institute
Radiophys & Electrical, Division Theoret Physics, Alikhanian Bros
St. 1, Ashtarak 378410, Armenia.
The publisher’s contact information for the journal Physical Review
E is: American Physical Society, One Physics Ellipse, College Pk,
MD 20740-3844, USA.
From: Emil Lazarian | Ararat NewsPress
Disclaimer: This article was contributed and translated into English by Emil Lazarian. While we strive for quality, the views and accuracy of the content remain the responsibility of the contributor. Please verify all facts independently before reposting or citing.
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