Study On Quantum Correlation Dynamics In The System Of Atom-Field Interaction Model

With the development of quantum mechanics,the theory of quantum information has begun to rise.This discipline includes mathematics,informatics,physics,computer science and other disciplines.It has become a research hotspot in recent years.The theory of quantum information has not only developed the theoretical basis,but also the experimental application based on the theory is also flourishing.Most applications are based on quantum entanglement.Quantum entanglement can accomplish tasks that classical physics can not accomplish,such as quantum teleportation and quantum dense coding.With the increasing understanding of quantum entanglement,we find that quantum entanglement has been unable to contain all quantum correlations.More scholars have proposed other methods to measure quantum correlations: quantum discord and geometric quantum discord.The study of quantum teleportation based on geometric quantum disagreement has been carried out experimentally.Therefore,it is of long term significance to study all kinds of quantum correlations.This paper first introduces the development history of quantum information theory and some basic concepts in quantum information theory,such as quantum entanglement,quantum discord and geometric quantum discord.The application of quantum entanglement,quantum dense coding,is also briefly described.What explains in quantum optics part of the basic structure of the model and its extension,Then we study the geometric quantum disjoint and dense coding channel capacity of the moving atom J-C model.We also discuss the influence of the field mode structure parameters,the number of photon in the cavity,the initial entanglement on the geometric quantum discord and the dense coding channel capacity.The results show that the geometric quantum misalignment is more robust than the quantum entanglement.The motion atomic single J-C model is more advantageous than the standard single J-C model to realize the quantum dense coding.It can improve the geometrical quantum discord and the dense coding channel capacity by adjusting the field mode structure parameters,the number of photon and initial entanglement in the cavity.Finally,we explore how to control the quantum entanglement,quantum discord and geometric quantum discord in the moving atom and field interaction models.Here we compare two transition modes: single photon process and two-photon process.The results show that the atom field coupling and can make the heat insulation and abrupt change,then the coupling coefficient of the atom and the field is a function of the variations,the slope of the function can be adjusted to control quantum correlations,and this type of regulation is more obvious on the two-photon process.The changes in the structure parameters of the field mode(and the correlation of the atomic motion)also affect the quantum entanglement,quantum disassociation,and the geometric quantum disassociation.