Localized whistlers in magnetized spin quantum plasmas

Misra, A. P.; Brodin, Gert; Marklund, Mattias; Shukła, P. K.

doi:10.1103/physreve.82.056406

Cited by 46 publications

(41 citation statements)

References 53 publications

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“…From Eq. (22), it can be seen that the coefficient Q, P, and C of the nonlinear, dispersive, and damping terms are all dependent on the electron relativistic degeneracy effects and Zeeman energy. One can see in Sec.…”

Section: S Constant and Hmentioning

confidence: 98%

“…The approximate analytical solution of the modified NLSE (22) shows that the amplitudes of the envelope quantum magnetosonic solitary waves decrease with time, which is due to the small but finite magnetic diffusivity. The small but finite resistivity has crucial effects on the modulation instability of QMWs.…”

Section: Modulational Instability Of the Qwmsmentioning

confidence: 98%

“…The last term of the left hand of the modified NLSE (22) expresses the effect of the resistivity on the nonlinear propagation of the quantum magnetosonic envelope waves. From Eq.…”

Section: S Constant and Hmentioning

confidence: 99%

“…17 The high frequency quantum magnetosonic shock wave can also be used to ion acceleration. 18 Nonlinear collective processes in quantum plasmas have been investigated by including both quantum tunneling and electron spin effects on an equal footing, which can give rise to new collective linear and nonlinear magnetosonic excitations, 19 such as solitons, 20,21 localized whistlers, 22 and shock waves. 23 The effect of electron spin on magnetosonic waves can be incorporated via the spin force and macroscopic spin magnetization current.…”

Section: Introductionmentioning

confidence: 99%

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Modulational instability of spin modified quantum magnetosonic waves in Fermi-Dirac-Pauli plasmas

Wang

Eliasson

2013

Physics of Plasmas

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A theoretical and numerical study of the modulational instability of large amplitude quantum magnetosonic waves (QMWs) in a relativistically degenerate plasma is presented. A modified nonlinear Schrödinger equation is derived by using the reductive perturbation method. The modulational instability regions of the QMWs and the corresponding growth rates are significantly affected by the relativistic degeneracy parameter, the Pauli spin magnetization effects, and the equilibrium magnetic field. The dynamics and nonlinear saturation of the modulational instability of QMWs are investigated numerically. It is found that the increase of the relativistic degeneracy parameter can increase the growth rate of the instability, and the system is saturated nonlinearly by the formation of envelope solitary waves. The current investigation may have relevance to astrophysical magnetized compact objects, such as white dwarfs and pulsar magnetospheres

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Section: S Constant and Hmentioning

confidence: 98%

Section: Modulational Instability Of the Qwmsmentioning

confidence: 98%

“…The last term of the left hand of the modified NLSE (22) expresses the effect of the resistivity on the nonlinear propagation of the quantum magnetosonic envelope waves. From Eq.…”

Section: S Constant and Hmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modulational instability of spin modified quantum magnetosonic waves in Fermi-Dirac-Pauli plasmas

Wang

Eliasson

2013

Physics of Plasmas

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“…[4][5][6][7][8][9][10][11][12][13][14][15] and references therein). Much effort has been put into finding new instabilities driven by spin in low-frequency and electrostatic modes in the magnetized plasma regime [14,[16][17][18][19].…”

mentioning

confidence: 99%

Spin-Gradient-Driven Light Amplification in a Quantum Plasma

2012

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Investigation of the particle spin properties on the velocity space instability in high‐density plasmas

Khanzadeh

Mahdavi

2017

Contrib. Plasma Phys

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The nonresonant electromagnetic instabilities of the anisotropic velocity space (Weibel-like) have always been one of the interesting subjects for researchers. These electromagnetic instabilities play an important role in generating strong magnetic fields in laboratory plasmas for applications such as inertial confinement fusion and space plasmas. In this paper, we investigate the quantum effects of the particle spin on the electromagnetic instabilities. In the case of the presence of a magnetic dipole force and an electron precession frequency like the Vlasov equation, we derive the full quantum equation. This study shows that, in the presence of the spin-polarized effects, the growth rate of the instabilities is reduced compared to the classical cases and will not arise for low fractions of the temperature anisotropy for different values of the magnetic field. Indeed, it is expected that the probability of electron capture in the background magnetic fields and the effective collision with the particle increase because of the spin effect, so that a high portion of the electron energy is transmitted to the background plasma, and the temperature anisotropy governing the electron distribution is reduced. KEYWORDS electron precession frequency, magnetic dipole force, nonresonant instability, temperature anisotropy INTRODUCTIONQuantum plasma physics has many applications, for example, in the fields of high-intensity laser-plasma interaction, [1,2] metal and semiconductor nanostructures, [3,4] and astrophysical plasmas. [5,6] The electron density in semiconductors is much smaller than that in metals but the de Broglie wavelength of the charge carriers is comparable to the spatial scale of the profile. Therefore, the quantum effects associated with quantum tunneling particle dispersive effects (delocalized wave functions) can become important. As is known, the spin motions of quantum systems and the magnetization related to the intrinsic spin can be important in semiconductors, in metal alloys, and, more generally, in magnetic nanostructures. [7][8][9][10] For example, it is known that magnetic moment motion allows the magnetoresistive read-heads to respond to the bits of hard disks for memory. In the field of laser plasmas, in particular inertial confinement fusion (ICF) plasmas, the spin-polarized fuel idea was proposed initially by More. [11] Investigations have shown that the thermonuclear cross-section can increase by 50% by using spin-polarized D-T fuel. Consequently, the ignition thresholds can be reduced and the fraction of the fuel burned can be increased before target disassembly. Also, the driver energy required can be reduced by the spin-polarized fuel. In addition, the use of spin-polarized fuel can lead to an anisotropic emission of -particles in the fusion reaction product. This anisotropy spatially concentrates the plasma self-heating and leads to the development of fuel ignition. [12][13][14] In ICF, a large portion of the driver energy must be converted to fusion energy of the nuclear fuel for reachin...

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Localized whistlers in magnetized spin quantum plasmas

Cited by 46 publications

References 53 publications

Modulational instability of spin modified quantum magnetosonic waves in Fermi-Dirac-Pauli plasmas

Modulational instability of spin modified quantum magnetosonic waves in Fermi-Dirac-Pauli plasmas

Spin-Gradient-Driven Light Amplification in a Quantum Plasma

Investigation of the particle spin properties on the velocity space instability in high‐density plasmas

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