Research On Nonlocality And Linear Entropy Of Cavity-Transmon Coupled System Based On Super Operator

As an important property in quantum information theory,quantum nonlocality has important applications in quantum coding and quantum computer,and is one of the most remarkable features of quantum mechanics.As an important concept of quantum information theory,entropy can be used as a measure of system entanglement(purity).In this paper,the quantum nonlocality and linear entropy of the Cavity-Transmon Coupled System are studied,and some results have been obtained.The research shows that the non-locality of the system is periodic,and the linear entropy also has periodic fluctuations.When we consider the cavity field loss,the quantum non-locality will be destroyed,and the value of linear entropy will also tend to be due to the loss.A progressive value.The full text of the full text is as follows:First of all,we introduce the theoretical knowledge related to this thesis.including the following aspects:the basic theory of EPR fallacy,the proposal of Bell's inequality and its maximum destruction,and the generalization of Bell's inequality-CHSH inequality,quantum nonlocality The detection method,the super operator method for solving the main equation,and the definition of linear entropy and its properties.Secondly,this paper introduces the system model,and then briefly describes the calculation methods of the initial state of different cavity fields.Finally,we analyze and summarize our calculation results.The evolution of quantum nonlocality in the photon number state and the coherent state of the cavity-artificial atomic(transmon)coupling system is studied.Finally,based on the thesis model,the initial state of different cavity fields is applied,and the evolution law of linear entropy of atoms,fields and systems with time is calculated and studied.The final result of our calculation is analyzed and summarized.