TY - JOUR
TI - Influence of classical field on entanglement and photon statistics of n-level atom interacting with a two two-level atom
AU - Alotaibi Hammad
AU - Khalil Eied Mahmoud
AU - Abdel-Khalek Sayed
AU - Al-Barakaty Abdullah
JN - Thermal Science
PY - 2020
VL - 24
IS - 11
SP - 177
EP - 186
PT - Article
AB - In this study, we consider three interacting atoms, one of them represented  by N-level atom based on SU(2) Lie algebra and the other represented by a  two two-level atom in presence of the external field. The effect of the  external field on the dynamics of the proposed system is discussed in detail  for certain values for the external field. The dynamical expression of the  observable operators is obtained by using the Heisenberg equation of motion.  The general solution via solving Schrodinger equation is obtained. The  fidelity and concurrence formula as a measure of entanglement between two  two-level atom are calculated and discussed in detail. We explore the sudden  death and sudden birth phenomena with and without the presence of external  field. Finally, we compare the results of the fidelity, concurrence and  second-order correlation function for some values of the initial state and  the external field parameters.