Structural properties of effective potential model by liquid state theories

This paper investigates the structural properties of a model fluid dictated by an effective inter-particle oscillatory potential by grand canonical ensemble Monte Carlo （GCEMC） simulation and classical liquid state theories. The chosen oscillatory potential incorporates basic interaction terms used in modeling of various complex fluids which is composed of mesoscopic particles dispersed in a solvent bath, the studied structural properties include radial distribution function in bulk and inhomogeneous density distribution profile due to influence of several external fields. The GCEMC results are employed to test the validity of two recently proposed theoreticai approaches in the field of atomic fluids. One is an Ornstein-Zernike integral equation theory approach; the other is a third order ＋ second order perturbation density functional theory. Satisfactory agreement between the GCEMC simulation and the pure theories fully indicates the ready adaptability of the atomic fluid theories to effective model potentials in complex fluids, and classifies the proposed theoretical approaches as convenient tools for the investigation of complex fluids under the single component macro-fluid approximation.

原子系综双模压缩叠加相干态的制备和性质

提出了一个在双模腔中制备原子系综双模压缩叠加相干态的方案.此外,还讨论了所制备态的非经典性质.结果表明,双模压缩相干叠加态具有更强的非经典性质.

低于阈值激光功率密度下Mg原子的非序列双电离

基于经典系综模型,研究了Mg原子在低于重碰撞阈值激光功率密度下的非序列双电离(NSDI)。当少周期量级线性偏振激光的功率密度为3.0×10^(13) W·cm^(-2)时,末态关联电子动量分布中的电子对主要分布在第一、第二和第四象限,第一象限中的电子对呈现了明显的关联行为。分析了重碰撞和双电离之间的延迟时间,发现不同的延迟时间对应着不同的电离过程,延迟时间对电子出射过程具有显著影响;延迟时间小于半个周期的NSDI事件,双电子倾向于反方向出射,而延迟时间大于半个周期的,存在双电子同方向出射的可能。

双色反旋圆偏振激光场中分子的非序列双电离

利用经典系综方法,研究了氮气(N_(2))分子在周期量级双色反旋圆偏振激光场中的非序列双电离(NSDI),发现在确定的激光强度下,随着激光波长的增加,NSDI的产量明显减小,这是因为电子波包的扩散作用。研究发现NSDI电离机制受到激光波长的影响,随着激光波长的增大,碰撞激发电离越来越占主导,这与第一个电子的返回轨迹和返回能量有关。讨论了NSDI的电子动量分布,电子动量分布随激光波长有明显变化,激光波长越长,“旋转三瓣扇形”结构越明显。