  In this paper, the dynamics of quantum Fisher information of a qubit
interacting with a squeezed thermal environment are studied. The optimal
initial state of the qubit, the temperature of the environment, and the
interaction time, which maximize quantum Fisher information are obtained. Based
on the ohmicity of the environment, we compare the dynamics of quantum Fisher
information in ohmic, sub-ohmic, and super-ohmic regimes of the environment.
Moreover, it is shown that the precise estimation of parameters is robust
against squeezing.
