Abstract
Using the quantum Fisher information (QFI), we investigate the problem of the parameter estimation in quantum system dot (QDS) including the effects of different parameters. We find that the QFI is affected by the strength temperature and might be finite even for higher temperatures in the asymptotic limit. Furthermore, we show that there is an optimal value of temperature such that the precision of the parameter estimation is maximal and that revivals and retardation of information loss may occur by adjusting the initial conditions. Finally, we show that this quantity may be proposed to detect the amount of the total quantum information that a QDS state contains with respect to projective measurements.
•Problem of parameter estimation in quantum dot.•Significant of isolated quantum system dot in different tasks of quantum information and optics.•Temperature effect on the quantum Fisher information behavior.•Optimal condition for maximal information.•Asymptotic limit behavior of the quantum Fisher information.