Dynamical properties of quantum Fisher information of a two-level atoms interacting with two-mode superposition coherent state

• Main Authors: Haifa S. Alqannas, E.M. Khalil, S. Abdel-Khalek
• Format: Article
• Language: English
• Published: Elsevier 2021-08-01
• Series: Alexandria Engineering Journal
• Subjects: Mandel parameter; Entanglement; su(1,1) Lie group; Linear entropy
• Online Access: http://www.sciencedirect.com/science/article/pii/S1110016821001319

A quantum cavity filled with a nonlinear medium (Kerr like medium) and contains a 2-mode field interacting with time dependence of 2-qubit is investigated. Part of the two qubits interact in the form of an amplifier, while the other is in the form of a ladder. The constants of motion are calculated by using the Heisenberg differential equation. Moreover, the analytical solution is calculated by solving the Schrodinger differential equations. Some statistical quantities are calculated to identify the features of the proposed model. The effective of the nonlinear term on the phenomena of collapse and revival are discussed through atomic population. The amount of entanglement between the quantum subsystem, whether it is between the 2-qubit and the cavity field, or between the 2-qubit together are calculated using the linear entropy and the concurrence. The results indicated that there is a superstructure between the atomic population and the linear entropy, concurrence. The intensity of oscillations decreases for the entanglement between the field and the two qubits when the Kerr like medium of the Hamiltonian system is included. The nonclassical distribution of the quantum system decreases after taking Kerr like medium into account.