The Manipulation Of Two Atoms Injected At Different Time And Transformation Of Information In High-Q Cavity With π Pulse

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.Using shortπpulse , also called "kick", Haroche's group showed a time-reversed atom-filed interaction in a high-Q cavity .The system revived to the initial state except a phase kick. It is very important in the storing and transferring of quantum information. In this paper ,we studied a dissipative system of two atoms at different inject time coupled with a high-Q cavity, while aπpulse was added. 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 with different average photon numbers . We found the mesoscopic field could be a good passage of information of atom whenπpulse was added. The evolution of the second atom was greatly different when the kick pulse was injected in the field with few photon numbers . With this manipulation ,the information of the atoms could be controlled whether transferred or not. It could be a useful control in quantum information and quantum computation.