Nonlinear electrostatic drift waves in dense electron-positron-ion plasmas

Abstract

The Korteweg–de Vries–Burgers (KdVB)-type equation is obtained using the quantum hydrodynamic model in an inhomogeneous electron-positron-ion quantum magnetoplasma with neutral particles in the background. The KdV-type solitary waves, Burgers-type monotonic, and oscillatory shock like solutions are discussed in different limits. The quantum parameter is also dependent on the positron concentration in dense multicomponent plasmas. It is found that both solitary hump and dip are formed and their amplitude and width are dependent on percentage presence of positrons in electron-ion plasmas. The height of the monotonic shock is decreased with the increase of positron concentration and it is independent of the quantum parameter in electron-positron-ion magnetized quantum plasmas. However, the amplitude of the oscillatory shock is dependent on positron concentration and quantum parameter in electron-positron-ion plasmas.

Coupled nonlinear drift and ion acoustic waves in dense dissipative electron-positron-ion magnetoplasmas

“…͑11͒ of Ref. 26 because the authors linearized the electron density and threw away the higher order contribution very early in their calculations, which later introduces nonlinearity in the system. Note that the coefficient of nonlinearity in Ref.…”

“…Sabry et al 25 investigated the propagation of ion acoustic envelope solitary waves in dense e-p-i plasmas and found that such a plasma was modulationally unstable for nonplanar geometry that had no counterpart in planar geometry. Haque et al 26 studied the linear and nonlinear drift waves in inhomogeneous quantum plasmas with neutrals in the background in e-p-i plasmas and found that the positron concentration and quantum corrections appreciably modified the drift solitons and shocks in quantum magnetoplasmas. Recently, Ren et al 27 studied the linear electromagnetic drift waves in nonuniform quantum e-p-i magnetoplasma employing the QHD model and applied their results in the dense astrophysical environments.…”

Electrostatic soliton and double layer structures in unmagnetized degenerate pair plasmas

“…We have used the parameters for white dwarf having magnetic field B 0 ϳ 10 9 G, the minimum density on which pair annihilation effects can be ignored is n e,p0 ϳ 10 28 cm −3 and temperature on its surface ranges from 8000 to 40 000 K. [5][6][7][8] The electrostatic potential hump structures are obtained in the presence of stationary ions in e-p quantum plasmas as shown in Fig. 1.…”

“…The linear and nonlinear electrostatic and electromagnetic waves have been studied in classical and degenerate pair and electronpositron-ion ͑e-p-i͒ plasmas. [5][6][7][8][9][10][11] During this decade, the quantum plasma physics has gained importance due to its manifold applications from nanostructured materials to dense astrophysical matter. Plasma and quantum effects can coexist in ultrasmall scales in metallic and semiconductor systems [12][13][14][15] as well as in the next generation intense lasersolid density plasma interaction experiments 16 and in x-ray free-electron lasers.…”

Acoustic double layer structures in dense magnetized electron-positron-ion plasmas

“…However, when the amplitude of the wave is sufficiently large, one cannot neglect the nonlinearity in the system. The nonlinearity contribute to the localization of waves and lead to the different type of structures, such as solitons, shocks, double layers (DLs), vortices, [15][16][17][18][19] etc. In the last few years, the fundamental properties and applications of DLs have been extensively studied theoretically, 20 experimentally, 21 and in computer simulations.…”