Notes on Anomalous Quantum Wake Effects

Moldabekov, Zhandos A.; Ludwig, P.; Bönitz, M.; Рамазанов, Т. С.

doi:10.1002/ctpp.201500137

Cited by 25 publications

(30 citation statements)

References 24 publications

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“…Furthermore, our results should be of interest for dense quantum plasmas (warm dense matter), where wake effects are expected to exist for the ions [48,56,57]. Here, magnetization of streaming electrons should have similar effects as in the classical case.…”

Section: Resultsmentioning

confidence: 72%

Screened Coulomb potential in a flowing magnetized plasma

Joost

Ludwig

Kählert

et al. 2014

Plasma Phys. Control. Fusion

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Abstract. The electrostatic potential of a moving dust grain in a complex plasma with magnetized ions is computed using linear response theory, thereby extending our previous work for unmagnetized plasmas [P. Ludwig et al., New J. Phys. 14, 053016 (2012)]. In addition to the magnetic field, our approach accounts for a finite ion temperature as well as ion-neutral collisions. Our recently introduced code Kielstream is used for an efficient calculation of the dust potential. Increasing the magnetization of the ions, we find that the shape of the potential crucially depends on the Mach number M . In the regime of subsonic ion flow (M < 1), a strong magnetization gives rise to a potential distribution that is qualitatively different from the unmagnetized limit, while for M > 1 the magnetic field effectively suppresses the plasma wakefield.

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Section: Resultsmentioning

confidence: 72%

Screened Coulomb potential in a flowing magnetized plasma

Joost

Ludwig

Kählert

et al. 2014

Plasma Phys. Control. Fusion

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“…One can consider the negative minimum in the ion potential to be insignificant as long as the characteristic energy E of the considered process in the plasma is E ≫ |Φ min |. It is worth noting that strong attractions between like‐charged particles exists in both the classical and quantum plasmas out of equilibrium, for example, the presence of a flow of mobile particles relative to the more inert species of particles . In the study by Shukla and Eliasson, using quantum hydrodynamics (QHD), the attraction between like‐charged ions in equilibrium plasmas due to the polarization of the surrounding electrons was reported.…”

Section: Discussionmentioning

confidence: 99%

Ion potential in non‐ideal dense quantum plasmas

Moldabekov

Groth

Dornheim

et al. 2017

Contrib. Plasma Phys

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The screened ion potential in non‐ideal dense quantum plasmas is investigated by invoking the Singwi–Tosi–Land–Sjölander approximation for the electronic local field correction at densities rs ≲ 2 and degeneracy parameters θ ≲ 1, where rs is the ratio of the mean inter‐particle distance to the first Bohr radius, and θ is the ratio of the thermal energy to the Fermi energy of the electrons. Various cross‐checks with ion potentials obtained from ground‐state quantum Monte Carlo data, the random phase approximation, and with existing analytical models are presented. Furthermore, the importance of the electronic correlation effects for the dynamics in strongly coupled ionic subsystems for 0.1 ≤ rs ≤ 2 is discussed.

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“…The relation , linking the non‐interacting free energy density with the potentials for the quantum hydrodynamics, allowed us to determine the Bohm potential at a finite temperature in the static case. This, for instance, allows one to correctly calculate a statically screened potential of an ion (or impurity), but not in the case of dynamical screening (when the wake effect is important) . Presented results are also applicable in the low‐frequency regime, that is ω < kv F , but not in the high‐frequency case (

ω ≫ ℏ^{2} k_{F}^{2} true/ 2 m

).…”

Section: Resultsmentioning

confidence: 99%

Gradient correction and Bohm potential for two‐ and one‐dimensional electron gases at a finite temperature

Moldabekov

Bönitz

Рамазанов

2017

Contrib. Plasma Phys

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From the static polarization function of electrons in the random phase approximation, the quantum Bohm potential for the quantum hydrodynamic description of electrons and the density gradient correction to the Thomas–Fermi free energy at a finite temperature for the two‐ and one‐dimensional cases are derived. The behaviour of the Bohm potential and of the density gradient correction as a function of the degeneracy parameter is discussed. Based on recent developments in the fluid description of quantum plasmas, the Bohm potential for the high‐frequency domain is presented.

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Notes on Anomalous Quantum Wake Effects

Cited by 25 publications

References 24 publications

Screened Coulomb potential in a flowing magnetized plasma

Screened Coulomb potential in a flowing magnetized plasma

Ion potential in non‐ideal dense quantum plasmas

Gradient correction and Bohm potential for two‐ and one‐dimensional electron gases at a finite temperature

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