Quantum Information In Kicked Ising Model

Entanglement is the core resource of Quantum Information Theory, and also the primary means to achieve Quantum Information at the present time。Recently, a new measure of quantum correlation named quantum discord has been studied and plays an important role in quantum computation and quantum communication. In order to better understand the relationship between concurrence and quantum correlation, we study the spin1/2one dimension transverse Ising and kicked Ising model.In chapter two, We numerical study the concurrence, discord, and pairwise correlation at ground state, analyze and summarize the results. It can be seen from the results of concurrence, discord and pairwise has a close contact, In addition, get the exact relationship between concurrence and pairwise.We analyze the quantum phase transverse under different parameters while number of particles limits infinity, and compared with finite case. At last we give the result of dynamics of concurrence, discord, and pairwise correlation.