Enhancing the precision of parameter estimation in a dissipative qutrit via quantum feedback control and classical driving

In this paper, we use quantum feedback control and classical driving to enhance the precision of parameter estimation in a dissipative qutrit by investigating its dynamics of quantum Fisher information. We investigate the parameter estimation of a dissipative qutrit in a cavity which provides the quantum feedback to the qutrit. The results show that the precision of the parameter to be estimated can be effectively enhanced via the local quantum feedback control based on quantum-jump detection. Particularly, the higher parameter estimation accuracy can be achieved when the feedback control and classical driving are present at the same time.