Dynamical Screening and Wake Effects in Classical, Quantum, and Ultrarelativistic Plasmas

Moldabekov, Zhandos A.; Ludwig, P.; Joost, Jan‐Philip; Bönitz, M.; Рамазанов, Т. С.

doi:10.1002/ctpp.201400105

Cited by 32 publications

(23 citation statements)

References 26 publications

(40 reference statements)

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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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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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“…11-13 ], the potential is "bent"forward towards the projectile which confirms our discussion of the main text and the explanation in terms of quantum effects. A more detailed comparison of the non-relativistic and ultra-relativistic cases will be given elsewhere [56]. …”

Section: Discussionmentioning

confidence: 99%

Ion potential in warm dense matter: Wake effects due to streaming degenerate electrons

et al. 2015

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The effective dynamically screened potential of a classical ion in a stationary flowing quantum plasma at finite temperature is investigated. This is a key quantity for thermodynamics and transport of dense plasmas in the warm dense matter regime. This potential has been studied before within hydrodynamic approaches or based on the zero temperature Lindhard dielectric function. Here we extend the kinetic analysis by including the effects of finite temperature and of collisions based on the Mermin dielectric function. The resulting ion potential exhibits an oscillatory structure with attractive minima (wakes) and, thus, strongly deviates from the static Yukawa potential of equilibrium plasmas. This potential is analyzed in detail for high-density plasmas with values of the Brueckner parameter in the range 0.1 ≤ rs ≤ 1, for a broad range of plasma temperature and electron streaming velocity. It is shown that wake effects become weaker with increasing temperature of the electrons. Finally, we obtain the minimal electron streaming velocity for which attraction between ions occurs. This velocity turns out to be less than the electron Fermi velocity. Our results allow, for the first time, for reliable predictions of the strength of wake effects in nonequilibrium quantum plasmas with fast streaming electrons showing that these effects are crucial for transport under warm dense matter conditions, in particular for laser-matter interaction, electron-ion temperature equilibration and for stopping power.

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“…The common features and differences between the wakefield (dynamically screened ion potential) in dense quantum plasmas, in classical complex (dusty) plasmas, and in ultra‐relativistic quark‐gluon plasmas have been analysed in ref. . The peculiar non‐monotonic dependence of the dynamically screened ion potential was reported in ref.…”

Section: Introductionmentioning

confidence: 65%

“…Electrons streaming relative to ions can appear in plasmas as a result of the impact by electron (ion) beams and electron acceleration by lasers . In our previous works, we have studied the wakefield created by streaming electrons around an (immobile) ion by using the Mermin dynamical quantum dielectric function in relaxation time approximation . We extensively investigated different plasma parameters (densities, temperatures) and streaming velocities.…”

Section: Introductionmentioning

confidence: 99%

Effect of the dynamical collision frequency on quantum wakefields

Moldabekov

Amirov

Ludwig

et al. 2019

Contributions to Plasma Physics

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Previous papers on the quantum wakefield around an ion moving in a dense plasma have considered the collision frequency in the static approximation. In this work, we present the results of the dynamically screened ion potential taking into account the dynamical electron–ion collision frequency. The Lenard–Balescu dynamical collision frequency and various approximations to it are considered. As a main result of our investigation for the subsonic, sonic, and supersonic regimes, we find that the frequency dependence of collisions can be safely discarded if the electronic streaming velocity (relative to an ion) is comparable to or less than the electronic Fermi velocity.

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Dynamical Screening and Wake Effects in Classical, Quantum, and Ultrarelativistic Plasmas

Cited by 32 publications

References 26 publications

Ion potential in non‐ideal dense quantum plasmas

Ion potential in non‐ideal dense quantum plasmas

Ion potential in warm dense matter: Wake effects due to streaming degenerate electrons

Effect of the dynamical collision frequency on quantum wakefields

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