Quantum Fisher Information of Atomic System in the Presence of Dissipative Cavity and Kerr Medium

Abstract

The study examines the Quantum Fisher Information (QFI) of an atomic system with a dissipation cavity and kerr-like medium present. We first develop the QFI formulae for two different initial atomic states interacting with a dissipation cavity after developing the basic ideas of quantum information theory, atom field interactions, and quantum fisher information. The effects of the Markovian and non-Markovian environments with weak and strong atom-cavity coupling on the dynamical nature of QFI have been studied. Regarding the Kerr medium parameter of two atoms interacting with a single cavity mode, the second scenario talks about QFI. The results indicate that there is a difference in the peak values for the separable and partially entangled initial states for the Kerr medium QFI. Additionally, the presence or lack of photons within the cavity has an impact on it.