Bell States Atom Interaction With Large Detuning Cavity Radiation Spectrum

Today is an age which is undergoing a myriad changes in the twinkling of an eye; living in such an age, we need for up-to-date technology that allows us to share and impress information in a secure, reliable, high-seep way. Quantum Information is a new subject, which is the combination of Quantum Mechanics and Information science. So it has many problems are awaiting to solve. Its development will produce a great impact.The four Bell states play a more and more important role in quantum information. It is necessary to study the emission spectrum from cavity-bound atoms in Bell states. By means of time-evolution operator, in the paper we have studied the emission spectrum from two two-level entangled atoms in Bell states interacting with a large-detuned single-mode cavity field. Where the two two-level entangled atoms are initially prepared in the incoherent state |ψ~->, they are no radiate. The other threedressed states show the corresponding to characteristic of the structure. The emission spectra from the entangled-atom in |ψ~-> and |Φ~±> states with the Fock state show thesingle-peak structure; the symmetrical multi-peak structure both in a coherent input and a thermal input.