Abstract
In this article, we investigate the evolution of the quantum Fisher information and its flow based on quantum state estimation in the framework of the interaction between a two-level atom and two-mode squeezed field in a phase damped cavity. The analytical solution for this system when the atom is initially prepared in a superposition state and the field in a two-mode squeezed coherent state is obtained. The entanglement or nonlocal correlation between a two-level atom with two-mode squeezed field is quantified by the field and atomic tangle respectively. The total tangle is used as a quantifier of the entanglement between the system (atom-field) and environment. The effect of the phase damping parameter of the quantum Fisher flow and atom-field entanglement will be examined during the time evolution. Finally, we explore the relation between quantum Fisher information its flow and entanglement. (C) 2015 Elsevier GmbH. All rights reserved.