摘要We demonstrate theoretically that Li atoms can be transferred to states of a lower principal quantum number by exposing them to a frequency chirped microwave pulse. The population transfer of Li atoms from the n=75 state to n=70 with more than 90% efficiency is achieved by means of the sequential single-photon ∆ n=-1 transitions. The calculation fully utilizes all of the available orbital angular momentum l states for a given n, and the interference pattern and population evolution dynamics of individual l states are analyzed in detail. Using the time-dependent multilevel approach, we describe the process reasonably well as a sequence of adiabatic rapid passages.
Abstract：We demonstrate theoretically that Li atoms can be transferred to states of a lower principal quantum number by exposing them to a frequency chirped microwave pulse. The population transfer of Li atoms from the n=75 state to n=70 with more than 90% efficiency is achieved by means of the sequential single-photon ∆ n=-1 transitions. The calculation fully utilizes all of the available orbital angular momentum l states for a given n, and the interference pattern and population evolution dynamics of individual l states are analyzed in detail. Using the time-dependent multilevel approach, we describe the process reasonably well as a sequence of adiabatic rapid passages.
JIA Guang-Rui;ZHANG Ji-Cai;ZHANG Xian-Zhou;REN Zhen-Zhong. Coherent Control of Population Transfer in Li Atoms via Chirped Microwave Pulses[J]. 中国物理快报, 2009, 26(10): 103201-103201.
JIA Guang-Rui, ZHANG Ji-Cai, ZHANG Xian-Zhou, REN Zhen-Zhong. Coherent Control of Population Transfer in Li Atoms via Chirped Microwave Pulses. Chin. Phys. Lett., 2009, 26(10): 103201-103201.
[1] Mass D J et al 1998 Chem. Phys. Lett. 290 75 [2] Maeda H et al 2005 Science 307 1757 [3] Villeneuve D M et al 2000 Phys. Rev. Lett. 85542 [4] Gabrielse G et al 1999 Phys. Lett. B 455 311 [5]G1ushko B et al 1992 Phys. Rev. A 46 2823 [6] Fleischhauer M and Manka A S 1996 Phys. Rev. A 54 794 [7] Shore B W et al 1997 Phys. Rev. A 44 7442 [8] Bergmann K et al 1998 Rev. Mod.Phys. 70 1003 [9] Cai J et al 2008 Chin. Phys. Lett. 25 2041 [10] Zhang S A t al 2009 Chin. Phys. Lett. 26033201 [11] Lambert J et al 2002 Phys. Rev. A 66 053413 [12] Maeda H et al 2006 Phys. Rev. Lett. 96 073002 [13] Zhang X Z et al 2003 Phys. Rev. A 68 025401 [14] Zhang X Z et al 2005 Chin. Phys. 14 720 [15] Schweizer W, Fa$\beta$binder P, Gonzalez-Ferez R 1999 Atomic Data and Nuclear Data Tables 72 33
2009, Vol. 26 
