Zahra Ghaedi - Department of Physics, Shiraz University of Technology, Shiraz, Iran
Mehdi Hosseini - Department of Physics, Shiraz University of Technology, Shiraz, Iran.
Farrokh Sarreshtedari - Magnetic Resonance Research Laboratory, Department of Physics, University of Tehran, Tehran, Iran.

Here, the population transfer between two specific levels of Cesium atomunder the influence of chirped laser source has been numerically investigated. The maingoal of this study is the engineering of the population transfer between the ۶۲S۱/۲ and ۶۲P۱/۲levels of Cesium which is corresponding to its D۱ transition line using a chirped lasersource. Constructing the system Hamiltonian, as well as the initial and boundaryconditions, the time-dependent Schrödinger equations are numerically solved and thepopulation versus time for different physical parameters has been investigated. The finalpopulation of each state is calculated and discussed for changing the parameters such aslaser intensity, laser frequency and chirping parameter. The results show that using thechirped laser source with tuned parameters, we can arbitrarily control the population oflevels.

atomic population transfer, chirped laser, cesium atom, two-level system