Parameter estimation of spontaneous emission by performing projective measurements

The identification problem of open quantum systems was explored in this paper. We proposed an algorithm to testify the feasibility of a framework for dynamical generator identification through numerical simulations on the specific quantum process - the hydrogen atomic spontaneous emission induced by the two-level electronic transition from a high energy state to a low energy state. We demonstrated how to estimate spontaneous emission parameters by repeated projective measurements through the identification algorithm, and discussed the sampling frequency, the required least quantity of initial states and projective measurements and this algorithm´s the scope and performance.