Quantum Fisher information for a qubit system placed inside a dissipative cavity |
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Authors: | K. Berrada S. Abdel-Khalek A.-S.F. Obada |
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Affiliation: | 1. Laboratoire de Physique Théorique, Faculté des Sciences, Avenue Ibn Battouta, 1014-Agdal, Rabat, Morocco;2. Abdus Salam International Centre of Theoretical Physics, ICTP, Trieste, Italy;3. Mathematics Department, Faculty of Science, Sohag University, 82524 Sohag, Egypt;4. Mathematics Department, Faculty of Science, Al-Azhar University, Naser City, 11884 Cairo, Egypt |
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Abstract: | We study the time evolution of the quantum Fisher information of a system whose the dynamics is described by the phase-damped model. We discuss the correlation between the Fisher information and entanglement dynamics of a qubit and single-mode quantized field in a coherent state inside phase-damped cavity. Analytic results under certain parametric conditions are obtained, by means of which we analyze the influence of dissipation on the negativity and quantum Fisher information for different values of the estimator parameter. An interesting monotonic relation between the Fisher information and nonlocal correlation behavior is observed during the time evolution. |
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