The Manipulation Of Two Atoms Injected At Different Time And Fidelity Computing

A two-level atom interacting with a single cavity mode, the Jaynes-Cummings model, is one of the most interesting problems in Quantum Optics. Atoms and photons of quantized radiation field can be viewed as carriers of qubits. By the interaction of atoms and field, we can realize the controlling and transferring of the qubits. In this paper, the system of two atoms with different injection time coupled with the cavity field was studied. The J-C Model and Master equation involving the dissipation became the starting point of our study. We derived the differential equations of the reduced density matrix, and also numerically solved the transient evolution of atoms referring to the experiment parameters of Haroche's group. It was obviously found that the initial field, atomic state and field damping could affect the information transferring. The difference of injection time of the second atom would result in the evolution of the first atom which was distinct from the evolution with no injection,which was emphasized in this paper. The figures agreed with our conclusions very well. According to the above discussions, the manipulation of atoms could be realized. Moreover, the quantum information could be transmitted with high fidelity.