Slow Dynamics Of Nonreciprocal System In A Binary Dust Plasma

Dust plasma is an emerging research topic and has developed very rapidly in recent years.Using its unique nature,complex plasmas,as a model system,can study various physical properties of traditional matter at the "atomic" level and kinetic-scale kinematic processes that combine discrete particle motion with continuous media movement,has immeasurable significance to basic research.Based on the theory of mode coupling(MCT),a simple Yukawa model and a complex wake wake model are constructed by using molecular dynamics simulations:(I)Realization of dust plasma in liquid,supercooled liquid,Glassy and solid to research static structure,slow dynamics and phase transition of dust plasma;(ii)simulate the experiment to compare the simulation and the experiment and make a theoretical explanation of the experimental phenomena,but also help follow-up experiments to improve.In Chapter 5,we use the simple Yukawa model to study the influence of the ratio of two kinds of particles in the binary dust plasma system on the transformation point.As the proportion of large particles in the system(ie,large charge)increases,the system transformation point defined by traditional coupling constants decreases,ie,they are inversely proportional.Therefore,we propose that the ratio of two kinds of particles in the system should be considered when defining the coupling strength.In addition,during the simulation,we found that the simple Yukawa model can not obtain the glassy system predicted by the mode coupling theory.In Chapter 6,we consider the wake effect caused by the highly anisotropic ion distribution in the dust plasma system and approximate it as the point charge to establish a complex wake model.During the simulation,we found that although the phase states predicted by the mode coupling theory can be obtained by adjusting the parameters,the size and initial conditions of the system have a great impact on the simulation.Our solution is to transform different initial conditions for each set of simulations to get the statistical characteristics of the system.In Chapter 7,we study the propagation of shock waves in different phases(crystals and glass)based on a complex wake model.We find that the shock wave has little effect on the grain structure of the crystal system,but significantly changes the grain structure of the glassy system,ie,the grain structure is completely different before and after the shockwave propagation.Finally,we summarize our research work and put forward the problems still solved in the field of binary dust plasma system simulation as well as feasible solutions and ideas.