Complete Swapping of Quantum Entanglement Information through Nonresonant Interaction by Intensity-dependent Coupling
Yuying An · Acta Sinica Quantum Optica · 2008
From the viewpoint of complete quantum theory,the process of the nonresonant interaction of atoms with cavity fields by intensity-dependent coupling was analyzed in the joint system consisting of multi-atom and multi-cavity.It is found that the quantum entanglement information can be completely interchanged between the atomic maximal entangled state and the maximal odd-even-like coherent entangled state by controlling the time of atoms interacting with cavity fields and measuring the atom states just being out of cavity.The quantum information can be completely swap by properly limiting the detuning value.The procedures mentioned above show that the process of evolution is reversible within the close system.