We demonstrate that the maximum coherent superposition state can be selectively prepared using a sequence of pulse pairs in lambda-type atomic systems, with the final level as a doublet. In each pair, the Stocks pulse comes before the pump pulse, with their back edges overlapping. Numerical results indicate that by tuning the interval of the adjacent pulse pairs, the selective maximum coherent superposition state preparation between the initial and one of the final levels can be achieved. The phenomenon is caused by the accumulative property of the pulse sequence.
© 2011 Chinese Optics Letters
Li Deng, Yueping Niu, and Shangqing Gong, "Selective preparation of the maximum coherent superposition state in four-level atoms," Chin. Opt. Lett. 9, 112701- (2011)