项目名称: 超冷强耦合等离子体中三体复合现象的模拟研究
项目编号: No.11304329
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 郭丽
作者单位: 中国科学院上海光学精密机械研究所
项目金额: 25万元
中文摘要: 超冷等离子体是冷原子开拓的最新前沿之一,它是冷原子物理和等离子体物理 的最新交叉前沿。强耦合等离子体是超冷等离子体中最吸引人的地方。当耦合强度达到一定 程度时,系统会出现特有的现象--"无序诱导加热""热动能振荡"等现象;耦合度更强 时系统会发生相变,但是由于三体复合效应的存在,加热了电子,导致电子耦合强度一直处 于弱强耦合区域。本项目我们将主要研究强耦合等离子体中的三体复合效应。通过本项目的 研究,可望得到强耦合等离子中三体复合率与系统初始电子温度、电子密度、初始密度分布 以及耦合系数的关系,并进一步找出减小或者抑制三体复合效应的方法,为超冷等离子中的 电子达到强耦合状态奠定基础。
中文关键词: 超冷中性等离子;等离子体振荡;电荷分离;强耦合;粒子对相关 函数
英文摘要: Ultracold plasma is one of the advanced projectes in the field of cold atom physics,which is an interdisciple science developed by the interaction of cold atom physics and plasma physics.Strongly coupled plasma is the most attractive place in the Ultracold plasma.When coupling strength reaches a certain degree, special phenomena appear,eg "disorder-induced heating""kinetic energy oscillations"; When coupling strength is more stronger, phase transition occurs. However because three-body recombiantion heats the electrons, the electronic coupling strength has been in a weak-strong coupling region. We mainly study the three-body recombination in the strongly coupled plasma. Through the studies in the Project, we expect to get the relations between the three-body recombination and initial electron temperature, electron density, initial density distribution, coupling parameter. Further, we expect to find the methods of reducing or inhibiting the effect of three-body recombination, which lay the foundation for the electrons of the ultracold plasma to achieve strong coupling state.
英文关键词: Ultracold neutral plasm;Plasma oscillation;Charge imbalance;Strong coupling;Pair correlation