umu.sePublications
Change search
Refine search result
1 - 44 of 44
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the 'Create feeds' function.
  • 1. Abdelsalam, UM
    et al.
    Moslem, WM
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Nonlinear Physics Centre & Center for Plasma Science and Astrophysics, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany; GoLP/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; School of Physics, Faculty of Science & Agriculture, University of Kwazulu-Natal, Durban 4000, South Africa; Department of Physics, CITT, Islamabad, Pakistan.
    Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 22, 4057-4061 p.Article in journal (Refereed)
    Abstract [en]

    Fully nonlinear propagation of ion-acoustic solitary waves in a collisionless dense/quantum electron-positron-ion plasma is investigated. The electrons and positrons are assumed to follow the Thomas-Fermi density distribution and the ions are described by the hydrodynamic equations. An energy balance-like equation involving a Sagdeev-type pseudo-potential is derived. Finite amplitude solutions are obtained numerically and their characteristics are discussed. The small-but finite-amplitude limit is also considered and an exact analytical solution is obtained. The present studies might be helpful to understand the excitation of nonlinear ion-acoustic solitary waves in a degenerate plasma such as in superdense white dwarfs.

  • 2. Ali, S
    et al.
    Moslem, WM
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Max-Planck Institut für extraterrestrische Physik, D-85741 Garching, Germany; GoLP/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.
    Wake potential with mobile positive/negative ions in multicomponent dusty plasmas2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 44, 6650-6652 p.Article in journal (Refereed)
    Abstract [en]

    We employ the test charge approach to calculate the electrostatic potential for a test charge in a multicomponent dusty plasma, whose constituents are the Boltzmann distributed electrons, mobile positive and negative ions, and immobile positive/negative charged dust particles. By using the modified dielectric constant of the dust-ion-acoustic (DIA) waves, the Debye screening and wake potentials are obtained. It is found that the presence of mobile negative ions significantly modify the DIA speed and the wake potential. The present results are relevant to polar mesosphere and microelectronic in the context of charged particle attraction and repulsion.

  • 3.
    Andersson, Ove
    et al.
    Umeå University, Faculty of Science and Technology, Physics.
    Soldatov, Alexander
    Umeå University, Faculty of Science and Technology, Physics.
    Sundqvist, Bertil
    Umeå University, Faculty of Science and Technology, Physics.
    Reorientational relaxation in C60 following a pressure induced change in the pentagon/hexagon equilibrium ratio1995In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 206, no 3-4, 260-264 p.Article in journal (Refereed)
    Abstract [en]

    The orientational structure of C60 depends on pressure and temperature. Pressurization below the glass transition temperature Tg can freeze in non-equilibrium orientational structures. The relaxation of such structures on heating through Tg has been studied through thermal conductivity measurements and the effects observed are explained in a simple model.

  • 4.
    Brodin, Gert
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, Padma
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Anomalous reflection and excitation of surface waves in metamaterials2007In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 367, no 3, 233-236 p.Article in journal (Refereed)
    Abstract [en]

    We consider reflection of electromagnetic waves from layered structures with various dielectric and magnetic properties, including metamaterials. Assuming periodic variations in the permittivity, we find that the reflection is in general anomalous. In particular, we note that the specular reflection vanishes and that the incident energy is totally reflected in the backward direction, when the conditions for resonant excitation of leaking surface waves are fulfilled.

  • 5.
    Brodin, Gert
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, L.
    A simple electron plasma wave2017In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 381, no 11, 1033-1035 p.Article in journal (Refereed)
    Abstract [en]

    Considering a class of solutions where the density perturbations are functions of time, but not of space, we derive a new exact large amplitude wave solution for a cold uniform electron plasma. This result illustrates that most simple analytical solutions can appear even if the density perturbations are large.

  • 6.
    Brodin, Gert
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, L.
    Large amplitude electron plasma oscillations2014In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 378, no 22-23, 1632-1635 p.Article in journal (Refereed)
    Abstract [en]

    We consider a cold plasma in order to find new large-amplitude wave solutions in the long-wavelength limit. Accordingly we derive two generic coupled equations which describe the energy exchange between the electrostatic and electromagnetic waves. A new kind of quasi-periodic behavior is found. Our derivations may be considered as a prerequisite to extended studies of stimulated Raman scattering for cases where the wave amplitudes are so large that standard perturbation techniques are not applicable.

  • 7.
    Bychkov, Vitaly
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Modestov, Mikhail
    Umeå University, Faculty of Science and Technology, Department of Physics.
    The Rayleigh-Taylor instability and internal waves in quantum plasmas2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 17, 3042-3045 p.Article in journal (Refereed)
    Abstract [en]

    Influence of quantum effects on the internal waves and the Rayleigh-Taylor instability in plasma is investigated. It is shown that quantum pressure always stabilizes the RT instability. The problem is solved both in the limit of short-wavelength perturbations and exactly for density profiles with layers of exponential stratification. In the case of stable stratification, quantum pressure modifies the dispersion relation of the inertial waves. Because of the quantum effects, the internal waves may propagate in the transverse direction, which was impossible in the classical case. A specific form of pure quantum internal waves is obtained, which do not require any external gravitational field.

  • 8. El-Awady, E. I.
    et al.
    El-Tantawy, S. A.
    Moslem, W. M.
    Shukla, P. K.
    Umeå University, Faculty of Science and Technology, Department of Physics. Ruhr Univ Bochum, Fak Phys & Astron, Inst Theoret Phys 4, D-44780 Bochum, Germany; Max Planck Inst Extraterr Phys, D-85741 Garching, Germany; GoLP Inst Super Tecn, P-1049001 Lisbon, Portugal; CCLRC Ctr Fundamental Phys, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England; Univ Strathclyde, SUPA Dept Phys, Glasgow G 40NG, Lanark, Scotland; Univ Kwazulu Natal, Fac Sci & Agr, Sch Phys, ZA-4000 Durban, South Africa.
    Electron-positron-ion plasma with kappa distribution: Ion acoustic soliton propagation2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 31-32, 3216-3219 p.Article in journal (Refereed)
    Abstract [en]

    Progress in understanding the nonlinear ion acoustic solitary waves which accompany collisionless electron-positron-ion plasmas with high-energy electrons and positrons (represented by kappa distribution) is presented. Both small and arbitrary amplitude solitary waves are investigated by deriving Korteweg-de Vries equation and energy-integral equation (involving a Sagdeev-like pseudopotential), respectively. The existence regions of the solitary pulses are defined precisely. Furthermore, numerical calculations reveal that only supersonic pulses may exist. The dependence of the solitary excitation characteristics on the superthermal parameters, the ion temperature, and the Mach number have been investigated. The present studies might be helpful to understand the excitation of nonlinear ion acoustic. solitary pulses in interstellar medium.

  • 9. El-Taibany, WF
    et al.
    Moslem, WM
    Wadati, Miki
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; School of Physics, University of KwaZulu-Natal, Durban 4000, South Africa.
    On the instability of electrostatic waves in a nonuniform electron-positron magnetoplasma2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 22, 4067-4075 p.Article in journal (Refereed)
    Abstract [en]

    The dispersion properties of three-dimensional electrostatic waves in a nonuniform electron-positron (EP) magnetoplasma are analyzed. A new dispersion relation is derived by use of the electron and positron density responses arising from the electron and positron continuity and Poisson equations. In the local approximation, the dispersion relation admits two wave modes with different velocities. The growth rates of various modes are illustrated both analytically and numerically. Considering the temperature gradients produces a linearly stable transverse mode. The growth rate of the slow mode instability due to the density inhomogeneity only is the highest one, though it appears at higher thermal energy. The angle of the wave propagation affects drastically on the instability features in each case. The applications of the present analysis are briefly discussed.

  • 10. Fedele, Renato
    et al.
    Jovanovic, Dusan
    de Nicola, Sergio
    Eliasson, Bengt
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, Padma Kant
    Mathematical and physical aspects of controlling the exact solutions of the 3D Gross-Pitaevskii equation2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 5, 788-795 p.Article in journal (Refereed)
    Abstract [en]

    The possibility of the decomposition of the three-dimensional (3D) Gross–Pitaevskii equation (GPE) into a pair of coupled Schrödinger-type equations, is investigated. It is shown that, under suitable mathematical conditions, it is possible to construct the exact controlled solutions of the 3D GPE from the solutions of a linear 2D Schrödinger equation coupled with a 1D nonlinear Schrödinger equation (the transverse and longitudinal components of the GPE, respectively). The coupling between these two equations is the functional of the transverse and the longitudinal profiles. The applied method of nonlinear decomposition, called the controlling potential method (CPM), yields the full 3D solution in the form of the product of the solutions of the transverse and longitudinal components of the GPE. It is shown that the CPM constitutes a variational principle and sets up a condition on the controlling potential well. Its physical interpretation is given in terms of the minimization of the (energy) effects introduced by the control. The method is applied to the case of a parabolic external potential to construct analytically an exact BEC state in the form of a bright soliton, for which the quantitative comparison between the external and controlling potentials is presented.

  • 11.
    Haas, F
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Brodin, Gert
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Zamanian, Jens
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Fluid moment hierarchy equations derived from quantum kinetic theory2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 3, 481-484 p.Article in journal (Refereed)
    Abstract [en]

    A set of quantum hydrodynamic equations are derived from the moments of the electrostatic mean-field Wigner kinetic equation. No assumptions are made on the particular local equilibrium or on the statistical ensemble wave functions. Quantum diffraction effects appear explicitly only in the transport equation for the heat flux triad, which is the third-order moment of the Wigner pseudo-distribution. The general linear dispersion relation is derived, from which a quantum modified Bohm–Gross relation is recovered in the long wave-length limit. Nonlinear, traveling wave solutions are numerically found in the one-dimensional case. The results shed light on the relation between quantum kinetic theory, the Bohm–de Broglie–Madelung eikonal approach, and quantum fluid transport around given equilibrium distribution functions.

  • 12. Hasegawa, A.
    et al.
    Shukla, P. K.
    Umeå University, Faculty of Science and Technology, Physics.
    Dust vortex modes in a nonuniform dusty plasma2004In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 332, 82- p.Article in journal (Refereed)
  • 13. Hussain, A.
    et al.
    Iqbal, Z.
    Brodin, G.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Murtaza, G.
    On the kinetic Alfven waves in nonrelativistic spin quantum plasmas2013In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 377, no 34-36, 2131-2135 p.Article in journal (Refereed)
    Abstract [en]

    We have studied the effect of electron spin on the kinetic Alfven waves in the presence of uniform static magnetic field in an electron-ion plasma. We deduce that the usual kinetic Alfven waves are modified via spin quantum effects of electrons. The dimensionless parameters that determine the relative importance of the electron spin become prominent at higher densities. It is found that the kinetic Alfven wave frequency decreases due to the electron spin contribution in the kinetic limit while in the inertial limit they are almost unaffected in a hot magnetized plasma. 

  • 14. Karimov, AR
    et al.
    Yu, MY
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Flow oscillations in radial expansion of an inhomogeneous plasma layer2011In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 375, no 27, 2629-2636 p.Article in journal (Refereed)
    Abstract [en]

    The cylindrically symmetric radial evolution of an inhomogeneous plasma layer expanding into vacuum is investigated nonperturbatively by first determining the spatial structure of the plasma flow structure. The evolution is then governed by a set of ordinary differential equations. The effect of the plasma inhomogeneity on the nonlinear coupling among the electron and ion flow components and oscillations is investigated

  • 15. Krasheninnikov, SI
    et al.
    Shevchenko, VI
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; SUPA Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom; Centre for Fundamental Physics (CfFP), Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom; Centro de Fisica, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal.
    Spinning of a charged dust particle in a magnetized plasma2007In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 361, no 1-2, 133-135 p.Article in journal (Refereed)
    Abstract [en]

    We present a novel mechanism for spinning of a charged dust particle in a magnetized plasma. Specifically, we show that the dust particle spinning is caused by a torque that is produced due to interactions between the electric field E and an asymmetric dust particle electric dipole that is induced by the cross-field (viz. the E x B, where B is the external magnetic field) plasma flow. The torque acting on the dust particle is proportional to vertical bar E vertical bar(2), so that both laminar and turbulent electric fields can cause dust particle spinning. For plasma parameters typical of tokamak edges. the characteristic dust spinning frequency is of the order of several hundred kHz.

  • 16. Mamun, A.A.
    et al.
    Shukla , P. K.
    Umeå University, Faculty of Science and Technology, Physics.
    Morfill , G.E.
    New cut-off frequency for low-frequency electromagnetic waves in a multi-ion magnetoplasma with charged dust particulates2004In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 323, 105- p.Article in journal (Refereed)
  • 17.
    Marklund, Mattias
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Morrison, P. J.
    Gauge-free Hamiltonian structure of the spin Maxwell-Vlasov equations2011In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 375, no 24, 2362-2365 p.Article in journal (Refereed)
    Abstract [en]

    We derive the gauge-free Hamiltonian structure of an extended kinetic theory, for which the intrinsic spin of the particles is taken into account. Such a semi-classical theory can be of interest for describing, e.g., strongly magnetized plasma systems. We find that it is possible to construct a generalized noncanonical Poisson bracket on the extended phase space, and discuss the implications of our findings, including stability of monotonic equilibria. (C) 2011 Elsevier B.V. All rights reserved.

  • 18.
    Mendonca, Jose Tito
    et al.
    IPFN, Instituto Superior Técnico, 1049-001 Lisboa, Portugal.
    Brodin, Gert
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    The influence of temporal coherence on the dynamical Casimir effect2011In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 375, no 27, 2665-2669 p.Article in journal (Refereed)
    Abstract [en]

    We study the dynamical Casimir effect in the presence of a finite coherence time, which is associated with a finite quality factor of the optical cavity. We use the time refraction model, where a fixed cavity with a modulated optical medium, replaces the empty cavity with a vibrating mirror. Temporal coherence is described with the help of cavity quasi-mode operators. Asymptotic expressions for the number of photon pairs generated from vacuum are derived.

  • 19.
    Mendonca, Jose Tito
    et al.
    Instituto Superior Tecnico.
    Brodin, Gert
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Vacuum effects in a vibrating cavity: time refraction, dynamical Casimir effect, and effective Unruh acceleration2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 35, 5621-5624 p.Article in journal (Refereed)
    Abstract [en]

    Two different quantum processes are considered in a perturbed vacuum cavity: time refraction and dynamical Casimir effect. They are shown to be physically equivalent, and are predicted to be unstable, leading to an exponential growth in the number of photons created in the cavity. The concept of an effective Unruh acceleration for these processes is also introduced, in order to make a comparison in terms of radiation efficiency, with the Unruh radiation associated with an accelerated frame in unbounded vacuum.

  • 20.
    Moslem, Waleed M.
    et al.
    Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Ali, Shahid
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Eliasson, Bengt
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Three-dimensional electrostatic waves in a nonuniform quantum electron–positron magnetoplasma2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 19, 3471-3475 p.Article in journal (Refereed)
    Abstract [en]

    The dispersion properties of three-dimensional electrostatic waves in a nonuniform quantum electron–positron magnetoplasma are examined. A new dispersion relation is derived using the electron and positron densities response arising from the balance between the quantum Bohm and electrostatic forces, and from the electron and positron continuity and Poisson equations. In the local approximation regime, the dispersion relation admits both oscillatory and purely growing instabilities those depend on the quantum parameters as well as the density, velocity and magnetic field inhomogeneities.

  • 21. Sabry, R
    et al.
    Moslem, WM
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Nonlinear Physics Centre & Center for Plasma Science and Astrophysics, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Max-Planck-Institut für extraterrestrische Physik, D-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; School of Physics, Faculty of Science & Agriculture, University of Kwazulu-Natal, Durban 4000, South Africa; Department of Physics, CITT, Islamabad, Pakistan.
    Explosive and solitary excitations in a very dense magnetoplasma2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 35, 5691-5694 p.Article in journal (Refereed)
    Abstract [en]

    A two-component dense magnetoplasma consisting of ions and degenerate electrons is considered. The basic set of hydrodynamic and Poisson equations are reduced to the Zakharov-Kuznetsov (ZK) equation by using the reductive perturbation technique. The basic features of the electrostatic excitations are investigated by applying a new direct method to the ZK equation. It is found that the latter has new solutions, which admit the propagation of either solitary or explosive pulses. The relevance of the new direct method to other nonlinear partial differential equations is also discussed.

  • 22.
    Shukla, Nitin
    et al.
    Institut für Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Shukla, P. K.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Generation of magnetic field fluctuations in relativistic electron-positron magnetoplasmas2006In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 362, no 2-3, 221-224 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that magnetic field aligned equilibrium relativistic plasmas flows can excite electromagnetic fluctuations in a magnetized electron–positron (e–p) plasma. For this purpose, a new dispersion relation is derived by using a relativistic two-fluid model and the Maxwell equations. The dispersion relation admits purely growing instabilities of electromagnetic perturbations across the ambient magnetic field direction. The results have relevance for understanding the origin of magnetic field fluctuations in cosmological and laser-produced plasmas.

  • 23.
    Shukla, Nitin
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, P. K.
    Generation of zonal magnetic fields by drift waves in a current carrying nonuniform magnetoplasma2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 24, 2461-2463 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that zonal magnetic fields (ZMFs) can be nonlinearly excited by incoherent drift waves (DWs) in a current carrying nonuniform magnetoplasma. The dynamics of incoherent DWs in the presence of ZMFs is governed by a wave-kinetic equation. The governing equation for ZMFs in the presence of nonlinear advection force of the DWs is obtained from the parallel component of the electron momentum equation and the Faraday law. Standard techniques are used to derive a nonlinear dispersion relation, which depicts instability via which ZMFs are excited in plasmas. ZMFs may inhibit the turbulent cross-field particle and energy transport in a nonuniform magnetoplasma. 

  • 24.
    Shukla, Nitin
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics. Grupo de Lasers e Plasmas, Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Portugal.
    Shukla, P K
    Umeå University, Faculty of Science and Technology, Department of Physics. Max-Planck Institut für extraterrestrische Physik, Garching, Germany; Grupo de Lasers e Plasmas, Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Portugal; Science and Technology Facilities Council (STFC) Centre for Fundamental Physics, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton, Didcot, Oxfordshire, United Kingdom; Scottish Universities of Physics Alliance (SUPA), Department of Physics, University of Strathclyde, Glasgow, Scotland, United Kingdom; School of Physics, University of KwaZulu-Natal, Durban, South Africa.
    Localized excitations in a nonlinearly coupled magnetic drift wave-zonal flow system2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 13-14, 1514-1516 p.Article in journal (Refereed)
    Abstract [en]

    We consider the amplitude modulation of the magnetic drift wave (MOW) by zonal flows (ZFs) in a nonuniform magnetoplasma. For this purpose, we use the two-fluid model to derive a nonlinear Schrodinger equation for the amplitude modulated MDWs in the presence of the ZF potential, and an evolution equation for the ZF potential which is reinforced by the nonlinear Lorentz force of the MDWs. Our nonlinearly coupled MDW-ZFs system of equations admits stationary solutions in the form of a localized MDW envelope and a shock-like ZF potential profile.

  • 25.
    Shukla, Nitin
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, Padma K.
    The dust acoustic wave in a bounded dusty plasma with strong electrostatic interactions between dust grains2011In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 375, no 17, 1809-1811 p.Article in journal (Refereed)
    Abstract [en]

    The dispersion relation for the dust acoustic wave (DAW) in an unmagnetized dusty plasma cylindrical waveguide is derived, accounting for strong electrostatic interactions between charged dust grains. It is found that the boundary effect limits the radial extent of the DAW. The present result should be helpful for understanding the frequency spectrum of the DAW in a dusty plasma waveguide with strongly coupled charged dust grains.

  • 26.
    Shukla, Nitin
    et al.
    Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Shukla, Padma Kant
    Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    A new purely growing instability in a strongly magnetized nonuniform pair plasma2007In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 367, no 1-2, 120-122 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that a strongly magnetized nonuniform electron–positron (hereafter referred to as e–p or pair) plasma is unstable against low-frequency (in comparison with the electron gyrofrequency) electrostatic oscillations. For this purpose, a dispersion relation is derived by using the Poisson equation as well as the electron and positron continuity equations with the guiding center drifts for the electron and positron fluids. The dispersion relation admits a purely growing instability in the presence of the equilibrium density and magnetic field inhomogeneities. Physically, instability arises because of the inhomogeneous magnetic field induced differential electron and positron density fluctuations, which do not keep in phase with the electrostatic potential arising from the charge separation in our nonuniform pair plasmas.

  • 27.
    Shukla, Nitin
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Nonlinear generation of zonal flows by ion-acoustic waves in a uniform magnetoplasma2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 4, 592-594 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that large-scale zonal flows (ZFs) can be excited by Reynolds stress of nonlinearly interacting random phase ion-acoustic waves (EIAWs) in a uniform magnetoplasma. Since ZFs are associated with poloidal sheared flows, they can tear apart short scale EIAW turbulence eddies, and hence contribute to the reduction of the cross-field turbulent transport in a magnetized plasma. (C) 2009 Elsevier B.V. All rights reserved.

  • 28.
    Shukla, Nitin
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Eliasson, Bengt
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Magnetization of a quantum plasma by photons2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 15-16, 1749-1750 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that the ponderomotive force of large-amplitude electromagnetic waves (photons), which includes the electron spin current and exchange potential contributions in a quantum plasma, can generate magnetic fields. The present result can account for the magnetic fields in dense compact astrophysical objects and in the next generation laser–solid density plasma interaction experiments.

  • 29.
    Shukla, Padma. K.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Properties of electrostatic waves in ultracold neutral plasmas2010In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 35, 3656-3657 p.Article in journal (Refereed)
    Abstract [en]

    Properties of electrostatic waves in ultracold neutral plasmas (UNPs) are examined, taking accounting the polarization force arising from interactions between the thermal electrons and strongly coupled ions. It is found that the polarization force reduces the phase speed of the modified dispersive ion-acoustic (M-DIA) wave in UNPs. Possibility of the ion-lattice formation in the presence of the M-DIA wave is discussed.

  • 30.
    Shukla, Padma K
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Brodin, Gert
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Excitation of multiple wakefields by short laser pulses in quantum plasmas2009In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 373, no 35, 3165-3168 p.Article in journal (Refereed)
    Abstract [en]

    We present a theoretical investigation of the excitation of multiple electrostatic wakefields by the ponderomotive force of a short electromagnetic pulse propagating through a dense plasma. It is found that the inclusion of the quantum statistical pressure and quantum electron tunneling effects can qualitatively change the classical behavior of the wakefield. In addition to the well-known plasma oscillation wakefield, with a wavelength of the order of the electron skin depth (λe=c/ωpe, which in a dense plasma is of the order of several nanometers, where c is the speed of light in vacuum and ωpe is the electron plasma frequency), wakefields in dense plasmas with a shorter wavelength (in comparison with λe) are also excited. The wakefields can trap electrons and accelerate them to extremely high energies over nanoscales.

  • 31.
    Shukla, Padma K.
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Brodin, Gert
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Nonlinear interaction between three kinetic Alfven waves2006In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 353, no 1, 73-75 p.Article in journal (Refereed)
    Abstract [en]

    Using Hall-MHD theory, we focus on the resonant interaction between three kinetic Alfvén waves. We thus derive three coupled equations which govern this process. It turns out that these equations contain the same coupling coefficient, directly showing that they satisfy the Manley–Rowe relations. The coupling coefficient can be written in a comparatively very simple form, that has not been deduced before. The decay rate, when a pump kinetic Alfvén wave decays into two similar Alfvén waves, is therefore easily estimated for plasmas of astrophysical interest.

  • 32.
    Shukla, Padma Kant
    Institut für Theoretische Physik IV, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Excitation of the dust ion-acoustic and dust acoustic-like perturbations by plasma density ripples2009In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 373, no 20, 1768-1770 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that the dust ion-acoustic (DIA) and dust acoustic (DA)-like perturbations can be excited by the electron density and ion density ripples, respectively. For this purpose, we use the relevant equations for the DIA and DA-like disturbances and derive the standard Mathieu equation. The latter admits unstable solutions, demonstrating that both the DIA and DA-like mode can be driven on account of the free energy in the plasma density ripples.

  • 33.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; School of Physics, University of KwaZulu-Durban, Durban 4000, South Africa; Nonlinear Physics Centre & Centre for Plasma Science and Astrophysics, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany; Grupo de Lasers e Plasmas, Departamento de Física do Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, 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.
    Extraordinary electromagnetic waves in a warm dense magnetoplasma2007In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 369, no 4, 312-314 p.Article in journal (Refereed)
    Abstract [en]

    The linear dispersion relation for elliptically polarized electromagnetic waves in a dense fermionic quantum magnetoplasma is derived, taking into account the quantum forces associated with the quantum Bohm potential and the magnetization energy of the electrons due to the 1/2-electron spin effect. It is found that the quantum forces modify the wave dispersion at scales that depend upon lambda(q) = h/2m V-F and lambda B = root h/2mw(c), where h is the Planck constant divided by 2 pi, m is the electron mass, V-F is the Fermi electron thermal speed, and w(c) is the electron gyrofrequency.

  • 34.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; School of Physics, University of Kwazulu-Natal, Durban 4000, South Africa; Nonlinear Physics Centre & Centre for Plasma Science and Astrophysics, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Max-Planck-Institut für Extraterrestrische Physik, D-85741 Garching, Germany; Grupo de Lasers e Plasmas, Departamento de Física do Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, 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.
    Generation and dynamics of plasma blobs in partially ionized tokamak scrape-off-layer2007In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 371, no 5-6, 453-456 p.Article in journal (Refereed)
    Abstract [en]

    A theoretical model for the generation and dynamics of plasma blobs in a tokamak scrape-off-layer (SOL) is presented. Specifically, it is suggested that plasma blobs could be generated due to a resistive Rayleigh-Taylor (RRT) instability in partially ionized SOL plasmas that contain equilibrium density and magnetic field inhomogeneities. By using the two-fluid model, a set of nonlinear equations for the low-frequency (in comparison with the ion gyrofrequency) electrostatic modes involved in the RRT instability is derived. In the linear limit, a new dispersion relation is obtained, and analyzed in some limiting cases. The nonlinear equations are useful for studying the dynamics of nonlinearly interacting finite amplitude RRT modes, which are linearly excited due to combined action of ionization as well as of density and magnetic field inhomogeneities in partially ionized SOL plasmas.

  • 35.
    Shukla, Padma Kant
    Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Generation of magnetic fields by the non-stationary ponderomotive force of electromagnetic waves in plasmas with streaming electrons2009In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 373, no 20, 1771-1772 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that the non-stationary ponderomotive force of large amplitude electromagnetic waves in plasmas with streaming electrons can spontaneously create magnetic fields. The present result may account for the magnetic fields in laser-produces plasmas, in cosmic plasmas, as well as in galactic and inter-galactic spaces.

  • 36.
    Shukla, Padma Kant
    Institut für Theoretische Physik IV, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Ion acceleration by the space charge electric force arising from the radiation pressure in a magnetized electron-positron plasma2009In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 373, no 39, 3547-3549 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that ions can be accelerated by the space charge electric force arising from the separation of electrons and positrons due to the ponderomotive force of the magnetic field-aligned circularly polarized electromagnetic (CPEM) wave in a magnetized electron-positron-ion plasma. The ion acceleration critically depends on the external magnetic field strength. The result is useful in understanding differential ion acceleration in magnetized electron-positron-ion plasmas, such as those in magnetars and in some laboratory experiments that aim to mimic astrophysical environments.

  • 37.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
    Magnetization of a pair-ion plasma2005In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 341, no 1-4, 184-186 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that ion temperature anisotropy in a pair-ion plasma can spontaneously create purely growing magnetic fields via a Weibel instability. The dispersion relation and the growth rate are presented.

  • 38.
    Shukla, Padma Kant
    Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany; School of Physics, University of KwaZulu-Natal, Durban 4000, South Africa; Nonlinear Physics Centre & Centre for Plasma Science and Astrophysics, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany; Grupo de Lasers e Plasmas, Departamento de Física do Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, 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.
    Purely growing electromagnetic mode driven by ion-temperature anisotropy in a collisional plasma2007In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 370, no 3-4, 316-318 p.Article in journal (Refereed)
    Abstract [en]

    We derive a linear dispersion relation for plane polarized electromagnetic waves in an unmagnetized collisional plasma containing ion-temperature anisotropy. It is found that the free energy stored in the latter can be coupled to a purely growing electromagnetic mode via electron-neutral collisions. Expressions for the growth rate and the corresponding threshold of our new instability are presented.

  • 39.
    Shukla, Padma Kant
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics. Fakultät für Physik und Astronomie, Institut für Theoretische Physik IV, Ruhr-Universität Bochum, D-44780 Bochum, Germany; Centro de Fisica dos Plasmas, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1096 Lisboa Codex, Portugal; Centre for Fundamental Physics, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom; and the Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92003-0407, USA.
    Eliasson, Bengt
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Low-frequency compressional electromagnetic waves in a nonuniform dusty magnetoplasma2005In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 337, no 4-6, 419-424 p.Article in journal (Refereed)
    Abstract [en]

    Dispersion properties of low-frequency (in comparison with the ion gyrofrequency) compressional electromagnetic waves in a nonuniform dusty magnetoplasma are presented. By using the plasma hydrodynamic equations together with the Faraday and Amp re laws, we derive a new dispersion relation. The latter is analyzed to show the relationship between various wave modes in dusty plasmas. The results should be useful in understanding the features of compressional electromagnetic waves in nonuniform astrophysical and laboratory dusty magnetoplasmas.

  • 40.
    Shukla, Padma
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Wiklund, Krister
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Excitation of zonal flows by electron convective cells in a nonuniform dusty magnetoplasma2001In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 283, no 5-6, 371-375 p.Article in journal (Refereed)
    Abstract [en]

    It is shown that the ponderomotive force of electron convective cells can generate zonal flows (or dust convective cells) in a nonuniform magnetoplasma. For this purpose, two fluid equations are used to derive a pair of coupled equations which govern the nonlinear coupling between electron and dust convective cells. A dispersion relation for the parametric interactions is deduced from the mode coupling equations. Explicit expressions for the growth rates of electron convective cell driven zonal flows are then obtained. The relevance of our investigation to laboratory and space plasmas is pointed out.

  • 41. Stenflo, Lennart
    et al.
    Brodin, Gert
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Collisional contribution to stimulated scattering in plasmas2014In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 378, no 5-6, 549-550 p.Article in journal (Refereed)
    Abstract [en]

    The influence of collisions on stimulated Brillouin scattering in magnetized plasmas is discussed. It is shown that new effects occur when the magnitude of the electron quiver velocity exceeds the electron thermal velocity.

  • 42.
    Valiev, Damir
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Bychkov, Vitaly
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Akkerman, V'yacheslav
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Eriksson, Lars-Erik
    Chalmers, Dept Thermo & Fluid Dynam, SE-41296 Gothenburg, Sweden.
    Marklund, Mattias
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Heating of the fuel mixture due to viscous stress ahead of accelerating flames in deflagration-to-detonation transition2008In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 27-28, 4850-4857 p.Article in journal (Refereed)
    Abstract [en]

    The role of viscous stress in heating of the fuel mixture in deflagration-to-detonation transition in tubes is studied both analytically and numerically. The analytical theory is developed in the limit of low Mach number; it determines temperature distribution ahead of an accelerating flame with maximum achieved at the walls. The heating effects of viscous stress and the compression wave become comparable at sufficiently high values of the Mach number. In the case of relatively large Mach number, viscous heating is investigated by direct numerical simulations. The simulations were performed on the basis of compressible Navier-Stokes gas-dynamic equations taking into account chemical kinetics. In agreement with the theory, viscous stress makes heating and explosion of the fuel mixture preferential at the walls. The explosion develops in an essentially multi-dimensional way, with fast spontaneous reaction spreading along the walls and pushing inclined shocks. Eventually, the combination of explosive reaction and shocks evolves into detonation.

  • 43.
    Wiklund, Krister
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Kaufman, Allan N.
    Physics department, University of California, Berkeley, USA.
    Hermitian structure for linear internal waves in sheared flow2001In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 279, no 1-2, 67-69 p.Article in journal (Refereed)
    Abstract [en]

    Motivated by the problem of linear mode conversion between ducted internal gravity waves in a sheared flow, we construct a variational principle based on a Hermitian evolution operator, obtained from Larsson's Hamiltonian formalism.

  • 44.
    Wiklund, Krister
    et al.
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Shukla, Padma
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Stenflo, Lennart
    Umeå University, Faculty of Science and Technology, Department of Physics.
    Mode coupling and stability of modified convective cells in a nonuniform dusty magnetoplasma2001In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 279, no 3-4, 239-242 p.Article in journal (Refereed)
    Abstract [en]

    Within the framework of a Hamiltonian approach, we study mode coupling and stability of nonlinearly interacting modified convective cells in a nonuniform dusty magnetoplasma. Expressions for the coupling coefficients and a stability criterion for the stationary solutions are presented. This is a necessary prerequisite for understanding the nonlinear dynamics of convective cells in a dusty magnetoplasma with a strongly nonuniform background.

1 - 44 of 44
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf