Thermal quantum Fisher information in quantum dot system

Using the quantum Fisher information (QR), 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 or temperature such that the precision or 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 or the total quantum information that a QDS state contains with respect to projective measurements. (C) 2013 Elsevier Ltd. All rights reserved.