Quantum State Population Transfer Of Rydberg Lithium Atoms Induced By Linearly Polarized Laser Pulses

It is great significance to control rydberg lithium of population transition effectively from one quantum state to another specific quantum state.It not only for the control of chemical reaction process is very important, but also for quantum optics in the preparation of a specific quantum state and coherent quantum state manipulation .In this paper I have accurately calculated the rydberg lithium wave function by specially designed B-spline base function in combination with the method of model potential of alkali atom. On this basis, Using the time-dependent multilevel approach (TDMA) and B-splines function,we have calculated the five quantum state population transfer of rydberg lithium atoms. We also analyse the influence of the four major parameters of the requency-chirped laser pulses field on transition. The result shows that the population can be completely transferred to the target state by changing the parameters of the laser pulse and achieve manual controls to a certain degree.It also shows that our theory is a fairly proper method to research these sorts of problems by using B-splines method and the model potential of alkali atom.It do not depend on the symmetry of, and resolve some difficult about perturbation theory. It can expediently research to transition of rydberg lithium atom from one quantum state to another specific quantum state.