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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-27 9:37 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Kinetic corrections and rotational flows in the 2D turbulence of quantum plasmas
Authors:
Dragos I. PALADE
*
Affiliation:
1) Faculty of Physics, University of Bucharest
2) National Institute of Laser Plasma and Radiation
E-mail
dragos.i.palade@gmail.com; dragos.palade@inflpr.ro
Keywords:
Quantum plasma, turbulence, kinetic, DFT.
Abstract:
A quantum plasma is a plasma in which the quantum effects become relevant. This happens whenever the Fermi energy of its constituents is comparable with their thermal energy.Due to recent advances in nano-technology, the dynamics associated with such systems has become highly relevant for the next generation of nano-scale electronic devices (based on metallic nanoparticles, nano-tubes, metal clusters, spinotronics, etc.). Recently [1,2], the problem of fluid-like turbulence in quantum plasma systems has been investigated. The theoretical model used has two main drawbacks: the solenoidal component of the velocity field associated with the quantum fluid has been neglected and the approximation used for the kinetic pressure tensor it is known to break-down at small scales (which becomes important when dealing with the turbulence spectrum). In the present work such corrections have been taken into account, providing simultaneously an extension of the Schrodinger-Poisson [1] model,as well as an approximation for the kinetic pressure tensor at small wavelengths. The theoretical model is used to simulate numerically the turbulence in a 2D quantum electron plasma. First numerical results confirm the dual cascade, but indicate deviations regarding the quantitative values of the transport coefficients and spectrum exponents.
References:
[1] Shaikh, Dastgeer, and P. K. Shukla. "Fluid turbulence in quantum plasmas." Physical review letters 99.12 (2007): 125002.
[2] Shukla, Padma Kant, and Bengt Eliasson. "Nonlinear aspects of quantum plasma physics." Physics-Uspekhi 53.1 (2010): 51-76.
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