| Entanglement Control of Two-Level Atoms in Dissipative Cavities |
| Paper ID : 1026-ISCHU |
| Authors |
|
Reyad Salah Eid * Mathematics department, Faculty of Science, Helwan unversity |
| Abstract |
| An open quantum bipartite system consisting of two independent two-level atoms interacting nonlinearly with a two-mode electromagnetic cavity field is investigated by proposing a suitable non-Hermitian generalization of the Hamiltonian. The mathematical procedure of obtaining the corresponding wave function of the system is clearly given. Pancharatnam phase is studied to give a precise information about the required initial system state, which is related to artificial phase jumps, to control the degree of entanglement (DEM) and get the highest concurrence. We discuss the effect of time-variation coupling, and dissipation of both atoms and cavity. The effect of the time-variation function appears as frequency modulation (FM) effect in the radio waves. Concurrence rapidly reaches the disentangled state (death of entanglement) by increasing the effect of field decay. On the contrary, the atomic decay has no effect. FM is a method to encode information in a laser field by varying the instantaneous frequency of the coupling between matter and laser. The system reaches disentangled state in the same period of scaled time, but the evolution itself changes by the presence of time varying parameter . We note that for various values of the system decay parameters γ, and Γ, the evolution of Pancharatnam phase in both curves approximately exhibits the same behavior. |
| Keywords |
| concurrence; control; entanglement; Pancharatnam phase; two-two level atoms |
| Status: Abstract Accepted (Oral Presentation) |