Trapping phenomenon of the parameter estimation in asymptotic quantum states

摘要: In this paper, we study in detail the behavior of precision parameter estimation open quantum systems using Fisher information (QFI). particular, sensitivity on a two-qubit system evolving under Kossakowski-type dynamical semigroups completely positive maps. such an environment, can even persist asymptotically for different effects initial parameters. We find that QFI be resistant to action environment with respect asymptotic states, and it long-time regime. addition, our results provide further evidence pure separable mixed states input state may enhance metrology. These features make kind good candidate implementation schemes optics high precision. Finally, show quantity proposed detect amount total whole contains projective measurements.