Optimal entropy squeezing sudden generation and its control for an effective two-level moving atom entanglement with the two-mode coherent fields

From the viewpoint of quantum information, this paper proposes aconcept and a definition of the atomic optimal entropy squeezingsudden generation (AOESSG) for the system of an effective two-levelmoving atom which entangles with the two-mode coherent fields. Italso researches the relationship between the AOESSG andentanglement sudden death of the atom-fields, and discusses theinfluences of atomic initial state on the AOESSG and obtains thesystem parameter which controls the AOESSG.