Response of quantum Fisher information, variance entropy squeezing and entanglement to the intrinsic decoherence of two non-degenerate fields interacting with two qubits

• Main Authors: S. Abdel-Khalek, E.M. Khalil, A.-B.A. Mohamed, M. Abdel-Aty, H.R. Besbes
• Format: Article
• Language: English
• Published: Elsevier 2020-12-01
• Series: Alexandria Engineering Journal
• Subjects: IQuantum Fisher information; Quantum entanglement; Concurrence; Dipole–dipole interaction
• Online Access: http://www.sciencedirect.com/science/article/pii/S1110016820304993
• ISSN: 1110-0168

We investigate the link between quantum Fisher information (QFI) and quantum entanglement for a scheme of two atoms that interact with two non-degenerate modes in the absence and presence of intrinsic decoherence effect. The explicit form of the density matrix approach to the dissipative systems is given when the cavity-field is in generalized coherent states. The dynamical behavior of the QFI is compared with the atom–atom concurrence entanglement. We examine the effect of the dipole–dipole interaction and intrinsic decoherence on the dynamical properties of the QFI, concurrence and variance entropy squeezing. It is found that the atom–atom concurrence and the QFI can be controlled by the intrinsic decoherence and the dipole–dipole interaction.