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Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma
Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, 44780, Bochum, Germany; School of Physics, Faculty of Science & Agriculture, University of Kwazulu-Natal, Durban, 4000, South Africa; Department of Physics, CITT, Islamabad, Pakistan; The Nonlinear Physics Centre & Center for Plasma Science and Astrophysics, Ruhr-Universität Bochum, 44780, Bochum, Germany; Max-Planck-Institut für extraterrestrische Physik, 85741, Garching, Germany; GoLP/Institute of Plasmas and Nuclear Fusion, Instituto Superior Técnico, 1049-001, Lisbon, Portugal; CCLRC Centre for Fundamental Physics, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, 0X11 0QX, UK; SUPA Department of Physics, University of Strathclyde, Glasgow G, 40NG, UK .
2009 (English)In: European Physical Journal D: Atomic, Molecular and Optical Physics, ISSN 1434-6060, E-ISSN 1434-6079, Vol. 51, no 2, 233-240 p.Article in journal (Refereed) PublishedText
Abstract [en]

Ion-acoustic envelope solitary waves in a very dense plasma comprised of the electrons, positrons and ions are investigated. For this purpose, the quantum hydrodynamic model and the Poisson equation are used. A modified nonlinear Schrodinger equation is derived by employing the reductive perturbation method. The effects of the quantum correction and of the positron density on the propagation and stability of the envelope solitary waves are examined. The nonplanar (cylindrical/spherical) geometry gives rise to an instability period. The latter cannot exist for planar case and it affected by the quantum parameters, as well as the positron density. The present investigation is relevant to white dwarfs.

Place, publisher, year, edition, pages
Springer, 2009. Vol. 51, no 2, 233-240 p.
Keyword [en]
perturbation method, quantum plasmas, pair production, dusty plasmas, solitons, instability, generation, modulation, vortices, holes
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-116027DOI: 10.1140/epjd/e2008-00286-8ISI: 000263417700009OAI: oai:DiVA.org:umu-116027DiVA: diva2:904800
Available from: 2016-02-19 Created: 2016-02-08 Last updated: 2016-02-19Bibliographically approved

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Shukla, Padma Kant
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