Theoretical Research On Enhancement Of Three-mode Gaussian State Light Fields Nonlocality

Quantum nonlocality of quantum states play a quite important character.For instant,it has many potentially important useful on quantum teleportation,quantum computer,quantum cryptography.Much attention has been paid to this subject since Einstein-Podolsky-Rosen(EPR)were published.In this dissertation,nonlocality property of three-mode Gassian state was studied on the basis of experiment theory detection.,furthermore,some achievements have been made.It is found that three-mode Gaussian state can become non-Gaussian state by means of non-Gaussian operations of IPS process,it is vertified that nonlocality of Gaussian state can be enhanceed by Bell inquality.The whole dissertation can be divided into three parts:First,about nonlocolity basic theoretical knowledge is intruduced.Second,show that detection principle of nonlocolity and model of three-mode Gaussian state light field.Furthermore,enhance principle of three-mode Gaussian state light field nonlocality were analyzed.Third,investigation of three-mode Gaussian state light field are summaried and expected.