Atomic - Light Field System Quantum Correlation And Quantum Zeno Effect

With the development of quantum information, quantum correlation and quantum Zeno effect attract more and more people’s attentions. Quantum properties in quantum systems are the important task to study quantum information. Quantum properties in quantum systems are the important task to study quantum information, which is understood for studying the system of atom interacting with the field in the quantum optics. This thesis makes a deeply research on the quantum correlation and quantum Zeno effect in the system of atom-optical field, and a series of significant results are obtained.In this paper, chapter one firstly analyzes the present development situation of the quantum correlation and quantum Zeno effect in the open system, and chapter two expounds the quantum measurement, quantum Zeno effect, quantum entropy and quantum entanglement. Under the system of the interaction between atom and field in Jaynes Cummings model, the main contents are as follows:(1) The trends of population inversion and survival probability at different time-intervals are investigated. Moreover, generation of quantum Zeno effect at the time-intervals short enough is found, and it is obtained that the quantum Zeno effect has an influence on population inversion.(2) The trends of entropy squeezing at different time-intervals, detuning and the photo number of the field are investigated. It is obtained that the entropy squeezing is disappeared at the shorter time-intervals. And entropy squeezing more quickly appears when detuning is bigger within limits. Moreover, it exhibits that the more photo number of the field, the shorter time of entropy squeezing effect under the circumstance.(3) The decay of survival probability is fast at the larger time-interval after measuring the system, and survival probability becomes zero in the end. And the bigger detuning is, the smaller entanglement of eigenstate and survival probability are. Therefore, it can be indirectly obtained the decay of survival probability has an effect on the entanglement of eigenstate.