arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1209.0914physics.plasm-ph
收藏

量子等离子体中原子尺度的离子团簇

Clustering of Ions at Atomic Dimensions in Quantum Plasmas

P. K. Shukla, B. Eliasson

摘要:

通过对稠密量子等离子体中新发现的Shukla-Eliasson吸引力(SEAF)影响下离子相互作用的运动方程的粒子模拟,我们证明了SEAF可以使离子在原子尺度上更接近.我们目前的模拟结果的合奏的离子在SEAF的存在下,没有和限制外部电位和离子和简并电子之间的碰撞的动力学。我们的粒子模拟显示,在SEAF下,离子相互吸引,靠近并在屏蔽离子的简并电子浴中形成离子簇。此外,外部限制电位产生稳健的离子簇,其可以具有雪茄状和球状形状,当限制电位被移除时,其保持稳定。讨论了离子团簇的稳定性。我们的结果可能对固体密度等离子体有应用价值(密度超过每立方厘米$10^{23}$),其中电子将简并,并且由于电子波函数和电子隧穿通过玻姆势、电子交换和电子交换以及与电子1/2自旋效应相关联的电子相关性的重叠所引起的电子反冲效应而产生量子力,简并电子的量子统计压力起决定性作用。

英文摘要:

By means of particle simulations of the equations of motion for ions interacting among themselves under the influence of newly discovered Shukla-Eliasson attractive force (SEAF) in a dense quantum plasma, we demonstrate that the SEAF can bring ions closer at atomic dimensions. We present simulation results of the dynamics of an ensemble of ions in the presence of the SEAF without and with confining external potentials and collisions between the ions and degenerate electrons. Our particle simulations reveal that under the SEAF, ions attract each other, come closer and form ionic clusters in the bath of degenerate electrons that shield the ions. Furthermore, an external confining potential produces robust ion clusters that can have cigar-like and ball-like shapes, which remain stable when the confining potential is removed. The stability of ion clusters is discussed. Our results may have applications to solid density plasmas (density exceeding $10^{23}$ per cubic centimeters), where the electrons will be degenerate and quantum forces due to the electron recoil effect caused by the overlapping of electron wave functions and electron tunneling through the Bohm potential, electron-exchange and electron-exchange and electron correlations associated with electron-1/2 spin effect, and the quantum statistical pressure of the degenerate electrons play a decisive role.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑