Population transfer in a three-level atom

Eugeny Korsunsky

G. Chern, Angela-Maithy N. Nguyen, Dmitry Budker +1 more

Xunming Cai, Jingyun Zhao, Zhaoying Wang +1 more

The interactions of sub-cycle and single-cycle pulses with two- or three-level quantum systems are studied, respectively. For the two-level quantum system, two cases in which the carrier frequency of pulses is in resonance and far from resonance with the atom are analysed. The ultrafast complete population transfer can be obtained. The sub-cycle pulse with a far off-resonant carrier frequency is found to be more suitable for the population transfer. The relation between the area of pulses and population transfer is clarified in the sub-cycle and single-cycle domain. For the Lambda-type three-level quantum system, more than 90% of population transfer can be achieved from one level to another. The scheme is insensitive to the variation of the laser parameters such as the peak Rabi frequency and the carrier frequency for both two- and three-level quantum systems.

Ning Xijin

A new method of population transfer in an atomic vapor through the trapped state of a three-level system coupled with two ew lasers is proposed. Employing two singlemode dye lasers interacting with 238U atomic vapor in a hollow-cathode discharge tube, it has been demonstrated experimentally that the method has an obvious effect on the population of the three-level A system.

M. Pinard, G. Grynberg, Paul Mandel

Alexandr I. Magunov, I. Rotter, С. И. Страхова