Effective screened potentials of strongly coupled semiclassical plasma

Ramazanov, T. S.; Dzhumagulova, K. N.

doi:10.1063/1.1499497

Cited by 170 publications

(89 citation statements)

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“…In [41] with the help of linear response method an effective potential was obtained, which is also used in this paper, by taking in to account both the diffraction effects at short distances and the screening effect at large distances…”

Section: Microfield Distribution Functionmentioning

confidence: 99%

Spectral Line Shapes of He I Line 3889 Å

Omar

González

et al. 2014

Atoms

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Spectral line shapes of neutral helium 3889 Å (2 3 S-3 3 P ) transition line are calculated by using several theoretical methods. The electronic contribution to the line broadening is calculated from quantum statistical many-particle theory by using thermodynamic Green's function, including dynamic screening of the electron-atom interaction. The ionic contribution is taken into account in a quasistatic approximation, where a static microfield distribution function is presented. Strong electron collisions are consistently considered with an effective two-particle T-matrix approach, where Convergent Close Coupling method gives scattering amplitudes including Debye screening for neutral helium. Then the static profiles converted to dynamic profiles by using the Frequency Fluctuation Model. Furthermore, Molecular Dynamics simulations for interacting and independent particles are used where the dynamic sequence of microfield is taken into account. Plasma parameters are diagnosed and good agreements are shown by comparing our

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Section: Microfield Distribution Functionmentioning

confidence: 99%

Spectral Line Shapes of He I Line 3889 Å

Omar

González

et al. 2014

Atoms

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“…In addition, it has been shown that the interaction potential in strongly coupled semiclassical plasmas would not be represented by the conventional DebyeHückel model because of nonideal particle interactions due to collective and quantum effects. [10][11][12][13] However, the behavior of the Wannier threshold law for the double-electron escape in strongly coupled semiclassical plasmas has not been specifically investigated as yet. Thus, in this brief communication we investigate the quantum and plasma screening effects on the Wannier threshold law for the double-electron escape from the ion in strongly coupled semiclassical plasmas.…”

mentioning

confidence: 99%

“…Thus, in this brief communication we investigate the quantum and plasma screening effects on the Wannier threshold law for the double-electron escape from the ion in strongly coupled semiclassical plasmas. The screened renormalized electron is obtained by using the screened pseudopotential model, 10 taking into account the quantum and correlation effects as a function of the de Broglie wavelength, Debye length, and charge of the residual ion. Furthermore, the quantum and plasma screening effects on the Wannier exponent for the double-electron escape is obtained by considering the screened effective charge of the residual ion in strongly coupled semiclassical plasmas.…”

mentioning

confidence: 99%

“…Recently, the useful analytic effective pseudopotential 10 of the particle interactions in strongly coupled semiclassical plasmas has been obtained on the basis of the dielectric response function formalism taking into account the correlation between the Boltzmann factor and quantum mechanical Slater sum. Using the effective pseudopotential model, 10 the screened electron-ion V ei ͑r 1 ͒ and electron-electron V ee ͑r 1 , r 2 ͒ interaction potentials in strongly coupled semiclassical plasmas would be obtained by where ␣␤ ͑=ប / ͱ 2 ␣␤ k B T͒ and ␣␤ are, respectively, the thermal de Broglie wavelength and reduced mass of the ␣-␤ pair, k B is the Boltzmann constant, T is the plasma temperature, and the screening parameters A ␣␤ and B ␣␤ are given by A ␣␤…”

mentioning

confidence: 99%

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Quantum and plasma screening effects on the Wannier threshold law for the double-electron escape in strongly coupled semiclassical plasmas

Jung

Kato

2008

Physics of Plasmas

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The quantum and plasma screening effects on the Wannier threshold law for the double-electron escape are investigated in strongly coupled semiclassical plasmas. The renormalized electron charge and Wannier exponent are obtained by considering the equation of motion in the Wannier configuration with the screened pseudopotential model as functions of the de Broglie wavelength, Debye length, and charge of the residual ion. It is shown that the renormalized electron charge significantly increases with an increase in the de Broglie wavelength, especially for small radial distances. It is also shown that the quantum effects enhance the Wannier exponent for the double-electron escape. In addition, the quantum effect on the Wannier threshold law is found to be more important than the plasma screening effect in strongly coupled semiclassical plasmas. © 2008 American Institute of Physics. ͓DOI: 10.1063/1.3021456͔After the seminal work of Wannier 1 on the ionization threshold law in 1953, the double-electron escape 2,3 from an atom or ion has received considerable attention because the investigation of the long-range radial electron-electron correlations has played an important role in many areas of physics. In addition, recently the electron ionization processes [4][5][6][7] in plasmas such as the electron-impact ionization and photoionization have received much attention since these processes provide useful information on various plasma parameters as well as knowledge about the dynamics and structure of atomic systems. It has been shown that the screened particle interaction in weakly coupled plasmas would be characterized mostly by the standard Debye-Hückel model. 8,9 In these weakly coupled plasmas, the average energy of interaction between plasma particles is known to be smaller than the average kinetic energy of a particle in plasmas. However, it is obvious that the physical processes in such strongly coupled plasmas would be quite different from those in weakly coupled classical plasmas. Moreover, the interest in strongly coupled plasmas has remarkably increased due to recent investigations on various physical properties of astrophysical compact objects and laser induced inertial confinement fusion plasmas. In addition, it has been shown that the interaction potential in strongly coupled semiclassical plasmas would not be represented by the conventional DebyeHückel model because of nonideal particle interactions due to collective and quantum effects. [10][11][12][13] However, the behavior of the Wannier threshold law for the double-electron escape in strongly coupled semiclassical plasmas has not been specifically investigated as yet. Thus, in this brief communication we investigate the quantum and plasma screening effects on the Wannier threshold law for the double-electron escape from the ion in strongly coupled semiclassical plasmas. The screened renormalized electron is obtained by using the screened pseudopotential model, 10 taking into account the quantum and correlation effects as a function of the de Broglie...

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“…This velocity dependence of the plasma screening length r 0 (v) is readily understood since the dynamic plasma screening effect turns out to be the static plasma screening case such as r 0 (v) → r D when the velocity of the projectile electron is smaller than the electron thermal velocity. In addition, an accurate form of the screened effective pseudopotential [4] of the particle interactions in strongly coupled semiclassical plasmas taking into account both the quantum-mechanical and plasma screening effects was obtained on the basis of the dielectric response function analysis. Hence, the velocity dependent dynamic interaction potential V Dy (r, v) between the projectile electron and target ion with nuclear charge Ze in strongly coupled semiclassical plasmas based on the Ramazanov-Dzhumagulova model [4] with the dynamic screening length r 0 (v) is obtained by…”

mentioning

confidence: 99%

Influence of the Dynamic Shielding on the Collisional Entanglement Fidelity in Strongly Coupled Semiclassical Plasmas

Jung

2013

Zeitschrift Für Naturforschung A

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The influence of the dynamic plasma shielding on the collisional entanglement fidelity is investigated in strongly coupled semiclassical plasmas. The partial wave analysis with the effective dynamic screening length is employed to obtain the dynamic entanglement fidelity as a function of collision energy, de Broglie wavelength, Debye length, and thermal energy. The results show that the collisional entanglement fidelity increases with increasing plasma temperature as well as de Broglie wavelength and, however, decreases with an increase of the Debye length. It is also found that the dynamic screening effect suppresses the collisional entanglement fidelity in strongly coupled semiclassical plasmas. In addition, it is found that the entanglement fidelity decreases with increasing de Broglie wavelength and, however, increases with increasing thermal energy. It is also found that the thermal effect on the entanglement fidelity would be more significant in the domain of low-collision energies.Key words: Dynamic Shielding; Collisional Entanglement Fidelity; Semiclassical Plasmas.The collision process in plasmas [1 -5] has been of a great interest since the process is known as the one of the major atomic processes and also has provided useful information on the electrical conductivity and mobility in plasmas. It is also shown that the entanglement fidelity in the collision process has received a considerable attention since it has been shown that the quantum correlation phenomenon [6] plays an important role for understanding the quantum measurements and information processing in various quantum systems. Recently, the physical properties of strongly coupled plasmas have been extensively investigated since the interiors of astrophysical compact objects and inertial confinement fusion plasmas would be classified as strongly coupled plasmas [7 -11]. In these strongly coupled semiclassical plasmas, the interaction potential would not be characterized by the standard Debye-Hückel model obtained by the linearization of the Poisson equation with the Boltzmann distribution owing to the multi-particle correlations caused by the collective screening and quantum-mechanical effects. In addition, it has been shown that the statically shielding model for particle collisions would not be reliable to describe the screened interaction potential in plasmas when the collision velocity is comparable to or smaller than the velocity of the plasma electron since the projectile particle would polarize the surrounding plasma particles. Hence, the dynamic motion of plasma particles should be then taken into account in these situations in order to properly represent the plasma screening effects on the various collision processes in plasmas. Hence, it would be expected that the dynamically screened collisional entanglement fidelities would be quite different from the statically screened entanglement fidelities for the elastic electron-ion collisions in strongly coupled semiclassical plasmas. Thus, in this paper, we investigate the influence of th...

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Effective screened potentials of strongly coupled semiclassical plasma

Cited by 170 publications

References 12 publications

Spectral Line Shapes of He I Line 3889 Å

Spectral Line Shapes of He I Line 3889 Å

Quantum and plasma screening effects on the Wannier threshold law for the double-electron escape in strongly coupled semiclassical plasmas

Influence of the Dynamic Shielding on the Collisional Entanglement Fidelity in Strongly Coupled Semiclassical Plasmas

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