Squeezed Operator Result In Mesoscopic Quantum Entanglement Based On Cavity QED

Quantum entanglement is a very important physical concepts in quantummechanics.simultaneously,It’s also different from classical physical,It’s one of the mostpeculiar and the most incredible features in quantum mechanics. Quantum entanglementhave a wide application in quantum information and quantum computing,so researchingthe entanglement state and the preparation of entanglement state is very important.Quantum entanglement is widely used in quantum teleportation, quantum keydistribution, quantum dense coding, quantum remote state preparation, quantumtelecloning and so on. Quantum entanglement is an indispensable and useful tool inquantum information processing. Quantum entanglement apply to quantumcommunication which can guarantee the normal communication between the two sidesfar apart, simultaneously,It’s also vital to guarantee the safety of both parties incommunication.The main research of cavity quantum electrodynamics is the interactionbetween the quantized electromagnetic and atoms.The article is based on the system ofcavity quantum electrodynamics,the main content of this article is proposing a schemeto prepare mesoscopic higher-order squeezed entanglement state and prepare moreatoms entangled state.This article is divided into three parts,in the first part,we introduce the basic theoryof quantum information science,the definition of quantum bit,the definition of quantumentanglement,the classification of the quantum entangled state,part of quantum logicgates and the important applications of quantum entanglement in quantum computingand quantum information,moreover,we also introduce the definition of quantumcoherent states and the definition of quantum squeezed states and some their importantapplication in quantum mechanics.In the second part,we introduce some basic concepts of the cavity quantumelectrodynamics,Mainly includes the basic principle of the cavity quantumelectrodynamics,the classification of cavity quantum electrodynamics,the mainparameters of the cavity quantum electrodynamics, full quantum theory of theinteraction between atoms and light field,and describing the ideal J-C model of theinteraction between atoms and the cavity.In the third part,firstly,we introduce how to prepare mesoscopic multimodecoherent entangled state in cavity quantum electrodynamics;then,this article introduce how to prepare mesoscopic multimode higher-order squeezed entangled state in cavityquantum electrodynamics；Finally，this article introduce how to prepare Dicke state，the condition of preparing Dicke state and introduce a method of detecting cavity modein the vacuum state.