Quantum Plasma Effects in the Classical Regime

Brodin, Gert; Marklund, Mattias; Manfredi, Giovanni

doi:10.1103/physrevlett.100.175001

Cited by 213 publications

(163 citation statements)

References 25 publications

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“…In a series of papers Fowler, Chandrasekhar, Bohm, Pines, and Levine ( [7,11,16,24,34]) have founded the concepts of relativistic-degeneracy and quantum plasma theories. Recent developments of quantum hydrodynamics (QHD) ( [18,26]) and spin-1/2 quantum magnetohydrodynamics (QMHD) models ( [9,27,28]) based on Wigner-Poisson and Schrödinger-Poisson formulation (e.g. see [19]) have opened a new area of research in the field of cold ionized plasmas.…”

Section: Introductionmentioning

confidence: 99%

Shukla–Eliasson attractive force: Revisited

Akbari-Moghanjoughi¹

2012

J. Plasma Phys.

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By investigation of the dielectric response of a Fermi-Dirac plasma in the linear limit and evaluation of the electrostatic potential around the positive stationary test charge, we find that the Shukla-Eliasson attractive force is present for the plasma density range expected in the interiors of large planets for a wide range of plasma atomic-number. This research which is based on the generalized electron Fermi-momentum further confirms the existence of the newly discovered Lennard-Jones-like attractive potential and its inevitable role in plasma crystallization in the cores of planets. Moreover, it is observed that the characteristics of the attractive potential is strongly sensitive to the variation of the plasma density and composition. Current research can also have applications in the study of strong laser-matter interactions and inertially confined plasmas.

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Section: Introductionmentioning

confidence: 99%

Shukla–Eliasson attractive force: Revisited

Akbari-Moghanjoughi¹

2012

J. Plasma Phys.

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“…Hence, application of non-interacting Fermi-Dirac QHD model to study the nonlinear wave dynamics in quantum plasmas such as compact stars is most appropriate for the relativistic degeneracy regime. [1][2][3][4][5][6][7]. This is mainly due to the quantum nature of particle interactions involved in this kind of plasmas.…”

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confidence: 99%

Nonlinear excitations in strongly coupled Fermi-Dirac plasmas

Akbari-Moghanjoughi

2012

Physics of Plasmas

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In this paper we use the conventional quantum hydrodynamics (QHD) model in combination with the Sagdeev pseudopotential method to explore the effects of Thomas-Fermi nonuniform electron distribution, Coulomb interactions, electron exchange and ion correlation on the large-amplitude nonlinear soliton dynamics in Fermi-Dirac plasmas. It is found that in the presence of strong interactions significant differences in nonlinear wave dynamics of Fermi-Dirac plasmas in the two distinct regimes of nonrelativistic and relativistic degeneracies exist. Furthermore, it is remarked that first-order corrections due to such interactions (which are proportional to the fine-structure constant) are significant on soliton dynamics in nonrelativistic plasma degeneracy regime rather than relativistic one. In the relativistic degeneracy regime, however, these effects become less important and the electron quantum-tunneling and Pauli-exclusion dominate the nonlinear wave dynamics. Hence, application of non-interacting Fermi-Dirac QHD model to study the nonlinear wave dynamics in quantum plasmas such as compact stars is most appropriate for the relativistic degeneracy regime. [1][2][3][4][5][6][7]. This is mainly due to the quantum nature of particle interactions involved in this kind of plasmas. An idealized Fermi-plasma model is the one in which fermions have much lower energies compared to the characteristic Fermi energy defined by the total number of fermions. In such case the quantum plasma is referred to as the zerotemperature quantum plasma. Despite the name, i.e. zero-temperature, it has been shown that such model is useful in description of some compact stellar objects with relatively higher temperatures as 10 4 K [8]. In a noninteracting low density degenerate Fermi gas model which is usually considered for solid-state materials the Pauli exclusion [9] is the dominant quantum effect although the quantum tunneling may also play a role in hydrodynamic properties of plasma. It has been shown that the tunneling effect which has negative pressure-like nature can lead to dissipation of nonlinear structures in quantum plasmas [10][11][12].The main reason for increasing interest in the study of quantum plasmas is two-fold.Semiconductors, inertial confined dense plasmas, laser-mater interaction, etc. can be treated as quantum-like plasmas. On the other hand, astrophysical compact-stars such as dwarfs, pulsars, etc. can also be studied within the framework of quantum plasmas. The study of degenerate Fermi gas under extreme conditions such as ultra-high density and magnetic field can lead to a better understanding of internal structures and physical process in superdense astrophysical entities and stellar chain of evolution. Densities of the order 10 6 -10 9 gcm −3 may arise in white-dwarfs due to gigantic gravitational force leading to a final collapse [13,14]. It is well known that the thermodynamical properties [15] and nonlinear wave dynamics [16][17][18] of a degenerate plasma can exhibit distinct behavior in nonrelativist...

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“…Application of QHD theory to charge screening in plasmas shows the existence of attractive force among ions of same charge caused by fully [42] or partially [43] degenerate electron fluid. Numerous interesting features of linear and nonlinear waves in dense plasmas have been reported during the past few years [44][45][46][47][48][49]. In this paper by using the appropriate QMHD model we study the dispersion relation for elliptically polarized transverse electromagnetic waves and show that the refraction index of electron fluid with arbitrary degeneracy predict the essential features of free electron fluid in metals.…”

Section: Introductionmentioning

confidence: 99%

Optical characteristics of finite temperature quantum electron gas

Akbari-Moghanjoughi

2017

Can. J. Phys.

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In this paper we study the propagation of elliptically polarized transverse electromagnetic waves in a quasineutral plasma with arbitrary degenerate electron fluid ranging from classical dilute to fully degenerate density regimes by using the appropriate collisional magnetohydrodynamics model, which incorporates the adiabatic quantum equation of states for high-frequency electron fluid compression and the Bohm quantum potential responsible for the collective quantum diffraction effect. Three distinct propagation modes are categorized corresponding to electron density regimes of dilute, intermediate, and fully degenerate plasmas. One of these modes is found to be purely of quantum mechanical origin and disappears in the absence of the quantum diffraction effect. The present generalized magnetohydrodynamics theory qualitatively describes key features of optical parameters and experimental data of dilute classical, semiconducting, and in fully degenerate plasmas. Different optical parameters, such as the refractive and absorption index of the new mode are investigated. It is shown that the optical response of the magnetized plasma with arbitrary degeneracy is essentially governed by three characteristic frequencies, namely, collision, plasmon, and cyclotron frequencies. The profound experimental minimum in the refractive index of arbitrary degenerate quantum plasmas and its dependence on the characteristic frequencies is studied in detail. Current investigation is of fundamental importance in high energy density and fusion plasma diagnostics and may provide key knowledge on the characteristics of astrophysical dense matter.

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Quantum Plasma Effects in the Classical Regime

Cited by 213 publications

References 25 publications

Shukla–Eliasson attractive force: Revisited

Shukla–Eliasson attractive force: Revisited

Nonlinear excitations in strongly coupled Fermi-Dirac plasmas

Optical characteristics of finite temperature quantum electron gas

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