相互作用的多流量子系统的统计描述

IF 2 3区 物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS Physics of Plasmas Pub Date : 2024-08-26 DOI:10.1063/5.0216478
M. Akbari-Moghanjoughi
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引用次数: 0

摘要

本研究在维格纳分布函数的框架内研究了静电耦合多流准粒子激元。研究指出,耦合多流集体量子激元的维格纳分布满足一个简单的类Liouville演化方程,并由此推导出多流准粒子激元的广义分布函数。计算了逆流电子和双流电子-正电子气体中集体量子激发的相空间结构及其演化,并首次结合多流量子系统的能带结构研究了量子流不稳定性发生时电子/正电子空穴的形成。研究并比较了对称和不对称量子流系统中的量子流不稳定性。研究发现,由于降低了相互作用势效应,相反电荷流的存在导致了整体稳定性。此外,还利用虚拟流的概念,将广义维格纳理论用于研究一维周期晶格中的电子传输。当前的广义统计形式主义可用于模拟具有集体静电相互作用的线性激发极限中的不同量子现象。其应用范围包括金属、半导体、质子器件中量子电荷输运的流不稳定性,与任意形状的外部电势相互作用的周期晶格中电荷载流子的相空间结构,以及活动星系核或极致密天体中密集电子-正电子射流的动态演化。
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Statistical description of interacting multistream quantum systems
In this research, the electrostatically coupled multistream quasiparticle excitations are studied in the framework of the Wigner distribution function. It is remarked that the Wigner distribution of coupled multistream collective quantum excitations satisfies a simple Liouville-like evolution equation from which a generalized distribution function for multistream quasiparticle excitations is deduced. The phase-space structure of collective quantum excitations in counter-stream electron and two-stream electron–positron gas with their evolution is calculated and electron/positron hole formation due to the onset of quantum stream instability is studied in connection with the energy band structure of the multistream quantum system, for the first time. The quantum stream instabilities in symmetric and asymmetric stream systems are studied and compared. It is found that the presence of opposite-charge streams leads to overall stability due to lowering the interaction potential effect. The generalized Wigner theory is also applied to study the electron transport in a one-dimensional periodic lattice using the concept of virtual streams. Current generalized statistical formalism may be used to model different quantum phenomena in the linear excitations limit with collective electrostatic interactions. The applications extend to the stream instability in quantum charge transport in metals, semiconductors, plasmonic devices, phase-space structure of charge carriers in periodic lattices interacting with the external potential of arbitrary shape and the dynamic evolution of dense electron–positron jets in active galactic nuclei or within the extremely dense astrophysical objects.
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来源期刊
Physics of Plasmas
Physics of Plasmas 物理-物理:流体与等离子体
CiteScore
4.10
自引率
22.70%
发文量
653
审稿时长
2.5 months
期刊介绍: Physics of Plasmas (PoP), published by AIP Publishing in cooperation with the APS Division of Plasma Physics, is committed to the publication of original research in all areas of experimental and theoretical plasma physics. PoP publishes comprehensive and in-depth review manuscripts covering important areas of study and Special Topics highlighting new and cutting-edge developments in plasma physics. Every year a special issue publishes the invited and review papers from the most recent meeting of the APS Division of Plasma Physics. PoP covers a broad range of important research in this dynamic field, including: -Basic plasma phenomena, waves, instabilities -Nonlinear phenomena, turbulence, transport -Magnetically confined plasmas, heating, confinement -Inertially confined plasmas, high-energy density plasma science, warm dense matter -Ionospheric, solar-system, and astrophysical plasmas -Lasers, particle beams, accelerators, radiation generation -Radiation emission, absorption, and transport -Low-temperature plasmas, plasma applications, plasma sources, sheaths -Dusty plasmas
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