NDLI: Solitary wave propagation in quantum electron-positron plasmas

Content Provider	Springer Nature Link
Author	Misra, A. P. Ghosh, N. K. Bhowmik, C.
Copyright Year	2008
Abstract	Existence of large amplitude stationary solitary wave structures in an unmagnetized electron-positron (e-p) plasma is studied using a quantum hydrodynamic (QHD) model that includes the quantum force (tunnelling) associated with the Bohm potential and the Fermi-dirac pressure law. It is found that in a quasi-neutral pair (e-p) plasma, where the dispersion is only due to the the quantum tunnelling effects, the large amplitude stationary solitary structure exists only when the normalized Mach speed,M <√2. Such solitary structures do not exist in absence of the Bohm potential term in an unmagnetized quasineutral pair (e-p) plasma. The system is shown to support only rarefactive stationary solitary waves. For such waves the amplitude, being independent of the quantum parameter H (the ratio of the electron plasmon to electron Fermi energy), decreases with the Mach number M, whereas the width increases with both M and H. The present theory is applicable to analyze the formation of localized coherent solitary structures at quantum scales in dense astrophysical objects as well as in intense laser fields.
Starting Page	373
Ending Page	377
Page Count	5
File Format	PDF
ISSN	14346060
Journal	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume Number	49
Issue Number	3
e-ISSN	14346079
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-10-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solid State Physics and Spectroscopy Complexity Quantum Computing, Information and Physics Quantum Physics Nanotechnology Atoms, Molecules, Clusters and Plasmas
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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