摘要
By using the time-dependent multilevel approach, we have calculated the coherent population transfer among the quantum states of potassium atom by a single frequency-chirped laser pulse. The results show that the population can be efficiently transferred to a target state and be trapped there by using an ＇intuitive＇ or a ＇counter-intuitive＇ frequency sweep laser pulse in the case of ＇narrowband＇ frequency-chirped laser pulse. It is also found that a pair of sequential ＇broadband＇ frequency-chirped laser pulses can efficiently transfer population from one ground state of the A atom to the other one.
By using the time-dependent multilevel approach, we have calculated the coherent population transfer among the quantum states of potassium atom by a single frequency-chirped laser pulse. The results show that the population can be efficiently transferred to a target state and be trapped there by using an ＇intuitive＇ or a ＇counter-intuitive＇ frequency sweep laser pulse in the case of ＇narrowband＇ frequency-chirped laser pulse. It is also found that a pair of sequential ＇broadband＇ frequency-chirped laser pulses can efficiently transfer population from one ground state of the A atom to the other one.
基金
Project supported by the Natural Science Foundation of Henan Province, China （Grant No 0411011900）.
