Elliptically polarized electromagnetic waves in a magnetized quantum electron-positron plasma with effects of exchange-correlation

Abstract

The dispersion properties of elliptically polarized electromagnetic (EM) waves in a magnetized electronpositron-pair (EP-pair) plasma are studied with the effects of particle dispersion associated with the Bohm potential, the Fermi degenerate pressure, and the exchange-correlation force. Two possible modes of the extraordinary or X wave, modified by these quantum effects, are identified and their propagation characteristics are investigated numerically. It is shown that the upper-hybrid frequency, and the cutoff and resonance frequencies are no longer constants but are dispersive due to these quantum effects. It is found that the particle dispersion and the exchange-correlation force can have different dominating roles on each other depending on whether the X waves are of short or long wavelengths (in comparison with the Fermi Debye length). The present investigation should be useful for understanding the collective behaviors of EP plasma oscillations and the propagation of extraordinary waves in magnetized dense EP-pair plasmas.

Surface plasmon oscillations in a semi-bounded semiconductor plasma

“…The third term on the rhs of equation (2) represents the particle dispersion, associated with the density correlation due to the quantum tunneling effect, given by [30,32] V n m n 2…”

Extraordinary Electromagnetic Waves in Weakly Relativistic Degenerate Spin-1/2 Magnetized Quantum Plasmas

“…Next, to show the influence of the quantum effects (including the quantum Bohm potential effects and the electron spin-1/2 effects) and the relativistic degenerate pressure effects on the extraordinary electromagnetic waves, we evaluate Eqs. (28) and (29) by substituting some typical parameters in the dense astrophysical objects [27,28] (like the outer shells of magnetized white dwarf stars and in the atmosphere of neutron stars), where the plasma density is 0 ≈ 10 36 m −3 and the magnetic field strength 0 ≈ 10 8 T. Figures 1(a)-1(c) display one of the branches of the extraordinary electromagnetic waves, the vertical axis represents the square of the refractive index, and the horizontal axis represents the wave frequency of the extraordinary electromagnetic waves. In Figs.…”

“…Next, to show the influence of the quantum effects (including the quantum Bohm potential effects and the electron spin-1/2 effects) and the relativistic degenerate pressure effects on the extraordinary electromagnetic waves, we evaluate Eqs. ( 28) and (29) by substituting some typical parameters in the dense astrophysical objects [27,28] (like the outer shells of magnetized white dwarf stars and in the atmosphere of neutron stars), where the plasma density is 𝑛 0 ≈ 10 36 m −3 and the magnetic field strength 𝐵 0 ≈ 10 8 T.…”

Ponderomotive effects in spin—polarized quantum plasma

“…The quantum degeneracy effects start playing a crucial role when plasma temperature T is comparable with or lower than the electron Fermi temperature T F i.e.,χ = T F /T ≈ 1 or > 1. It is of interest to study the collective phenomenon in high density quantum plasma considering the quantum potential, electron's Fermi pressure and the electron spin [13][14][15][16][17][18][19][20][21][22][23][24][25]. It is important applications range from plasmonics [26], astrophysics [27], ultracold plasmas [28], quantum well [29], x-ray free electron laser (FEL) [30], high density plasma experiments [31,32], inertial fusion [33] to future generation compression based laser plasma experiments [34].…”