The complete preservation of quantum entanglement information under detuning
Yuying An · Jiguang zazhi · 2007
The united system is analyzed by using of the viewpoint of quantum informatics.The system consists of many sub-system of multi-photon(N_k pho- tons)far-off resonant interaction of intensity-dependent coupling of two-level atoms with multi-mode(q modes)coherent state light field.It is found that initial quantum entangled information in the cavities or atoms can be completely preserved under only controlling the time(gt=/2)of the interaction of atoms with cavity fields.When q=1 and N_k=1,the results obtained will fit the special situation of single-mode single-photon interaction,which the author of this paper have studied recently.The quantum entangled information completely swapped under the simple condition.