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 qubit and input field initially in the photon subtracted squeezed thermal states. We examine the effect of qubit motion and number of photons subtracted on the quantum Fisher flow and qubit-field entanglement during the time evolution. Finally, we present useful way to generate and maintain high amount of entanglement through controlling the number of photons subtracted and qubit motion.