EVOLUTION OF PURITY AND DISTANCES BETWEEN DENSITY OPERATORS IN NON-RESONANT INTERACTION SYSTEM
双光子非共振作用系统中纯度和密度算符间距的演化

The time evolution properties of purity and distance between density operators in two photon non resonant interaction system are studied.The influence of detuning on purity and distance are discussed.The calculation results show that the detuning act as a modulation on distance of initial with final state and entanglement of atom with field.