arXiv subjects

Yuriy O. Tyshetskiy

Publications and source records attributed to Yuriy O. Tyshetskiy.

3 recordsLinked to original sources

arXiv2012

Comment on "Novel Attractive Force between Ions in Quantum Plasmas" [Shukla, Eliasson, PRL 108, 165007 (2012), arXiv:1112.5556]

It is shown that the attractive force between ions in a degenerate quantum plasma, recently predicted by Shukla and Eliasson [Shukla, Eliasson, PRL 108, 165007 (2012), arXiv:1112.5556] using a generalized quantum hydrodynamical model, is dwarfed by the attractive force due to kinetic effects that cannot be accounted for in the previous model. This suggests that the problem of charge shielding in a degenerate quantum plasma should necessarily be a kinetic one, providing the dominant part of the attractive force.

physics.plasm-ph↗

arXiv2012

Peculiarities of Surface Plasmons in Quantum Plasmas

Surface plasmons (SP) in a semi-bounded quantum plasma with degenerate electrons (e.g., a metal) is considered, and some interesting consequences of electron Pauli blocking for the SP dispersion and temporal attenuation are discussed. In particular, it is demonstrated that a semi-bounded degenerate plasma with a sharp boundary supports two types of SP with distinct frequencies and qualitatively different temporal attenuation, in contrast to a non-degenerate plasma that only supports one type of SP \citep{Guernsey_1969}.

physics.plasm-ph↗

arXiv2012

Ion response in a weakly ionized plasma with ion flow

We study the ion response to an initial perturbation in a weakly ionized plasma with ion flow driven by a dc electric field. The analysis is made by extending the classical Landau work [J. Phys. (USSR) 10, 25 (1946)] to the ion kinetic equation including ion-neutral collisions and a dc electric field. We show, in particular, that the complex frequencies of ion waves can be directly found from a known expression for the ion susceptibility [Phys. Rev. E 71, 016405 (2005); Phys. Rep. 27, 997 (2001)]; this is not obvious from its original derivation, because it only aims to describe the ion response for real frequencies.

physics.plasm-ph↗