Shielding effect of quantum plasma

Hu, Hongwei; Li, Li; Chen, Zhan-Bin; Chen, Wencong; Liu, Xiaobin; Li, Peng

doi:10.1063/1.5092836

Cited by 12 publications

(9 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[34][35][36] It is worthy to mention that effective potentials representing particle interaction in dense quantum plasmas have also been derived. [37,38] Moreover, the potential (2) stands for the static interaction between two charged particles. It works well when the relative velocity of the interacting charged particles is much less than the velocity of the background thermal plasma electrons.…”

Section: Introductionmentioning

confidence: 99%

Electron transfer in proton‐hydrogen collisions in dense semi‐classical hydrogen plasma

Das

Rej³

et al. 2021

Contributions to Plasma Physics

View full text Add to dashboard Cite

Quantum mechanical calculations have been accomplished to study the dynamics of the reaction: p + H(1s) → H(nlm) + p in dense semi-classical hydrogen plasma. Interactions among the charged particles in plasma are represented by a pseudopotential which takes care of the collective effects at large distances and quantum effect of diffraction at small distances. Various capture cross sections are computed for the incident proton energy lying within 10 to 500 keV by applying a distorted wave method which uses a variationally determined closed-form wave function of hydrogen atom. Moreover, an inclusive study is made to explore the effects of screening of plasma and quantum diffraction on various capture cross sections for a wide range of thermal Debye length and de Broglie wave length. It has been found that various cross sections suffer considerable changes due to varying Debye length and de Broglie wave length. K E Y W O R D Scharge transfer, distorted wave method, proton-hydrogen collision, pseudopotential, semi-classical hydrogen plasma

show abstract

Section: Introductionmentioning

confidence: 99%

Electron transfer in proton‐hydrogen collisions in dense semi‐classical hydrogen plasma

Das

Rej³

et al. 2021

Contributions to Plasma Physics

View full text Add to dashboard Cite

show abstract

“…It is seen that more and more bound states are lost as the number density of electrons increases until all energy levels become unbound. Recent investigation on quantum plasmas [56] with five different screening potentials reveals a quite ramarkable behavior for newly suggested potentials by Shukla and Eliasson (SE) and kinetic corrected Shukla-Eliasson (cSE) version. It is particularly shown that for the cSE potential around the metallic density of electrons the 1s energy level of hydrogen and helium move away from the continuum and become more bound.…”

Section: Introductionmentioning

confidence: 97%

Ground state energy of hydrogen-like ions in quantum plasmas

2020

View full text Add to dashboard Cite

Using the asymptotic iteration method (AIM) we investigate the variation in the 1s energy levels of hydrogen and helium-like static ions in fully degenerate electron gas. The semiclassical Thomas-Fermi (TF), Shukla-Eliasson (SE) and corrected Shukla-Eliasson (cSE) models are compared. It is remarked that these models merge into the vacuum level for hydrogen and helium-like ions in the dilute classical electron gas regime. While in the TF model hydrogen ground state level lifts monotonically towards the continuum limit with increase in the electron concentration, in the SE and cSE models universal bound stabilization valley through the energy minimization occurs at a particular electron concentration range for the hydrogen-like ion which for cSE model closely matches the electron concentrations in typical metals. The later stabilizing mechanism appears to be due to the interaction between plasmon excitations and the Fermi lengthscales in metallic density regime. In the case of helium-like ions, however, no such stability mechanism is found.The application of cSE model with electron exchange and correlation effects reveals that cSE model qualitatively accounts for the number-density and lattice parameters of elemental metals within the framework of free electron assumption. According to the cSE model of static charge screening a simple metal-insulator transition criterion is defined. Current investigation may further elucidate the underlying physical mechanisms in the formation and dielectric properties of metallic compounds.

show abstract

“…The Shukla-Eliasson attractive potential between screened ions has been predicted with a quantum hydrodynamic model [5][6][7], where the plasma density is expected to be similar to the one in the interiors of planets. Importantly the potential can be controlled by the plasma density and temperature, such that the inter-ion separation can be brought down to atomic dimensions [5][6][7][8][9][10], additionally due to the quantum statistics [11] and diffraction effects [12]. Previous studies have investigated classical phases, e.g., clustering and crystallization of ions, due to the attractive potential [6,13,14].…”

Section: Introductionmentioning

confidence: 99%

BCS-BEC crossover of ultracold ions driven by density-dependent short-range interactions in a quantum plasma

et al. 2021

View full text Add to dashboard Cite

We study theoretically a novel Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensate (BEC) crossover of two-specie ions in a three-dimensional quantum plasma at zero temperature. Central to this crossover is an effective short-ranged, attractive interaction potential between the ions shielded by the surrounding degenerate electrons. The interaction range and magnitude can be tuned non-monotonically by varying the carrier density of the quantum plasma. Low-energy collisions between two ions are characterized by the s-wave scattering length when the interaction range and the inter-ion spacing are comparable. We show that the s-wave scattering length can be changed from −∞ to ∞, leading to a BCS-BEC crossover driven purely by the plasma density. Through numerical and analytical calculations, we find that the quantum acoustic waves in the plasma exhibit distinct dispersion relations in the different regimes, providing a route to probe the crossover. Our study shows that the quantum plasma may offer a new platform to quantum simulate the BEC-BCS crossover and exotic phases with added tunability that might be difficult to achieve in conventional solid-state systems and ultracold atom gases.

show abstract

Shielding effect of quantum plasma

Cited by 12 publications

References 45 publications

Electron transfer in proton‐hydrogen collisions in dense semi‐classical hydrogen plasma

Electron transfer in proton‐hydrogen collisions in dense semi‐classical hydrogen plasma

Ground state energy of hydrogen-like ions in quantum plasmas

BCS-BEC crossover of ultracold ions driven by density-dependent short-range interactions in a quantum plasma

Contact Info

Product

Resources

About