Kinetic theory of (2+4)-level atom in σ +-σ - laser fields
于闯, 于得水, 陈景标
Kinetic theory of (2+4)-level atom in $\sigma^+-\sigma^-$ laser fields
Yu Chuang(于闯), Yu De-Shui(于得水), and Chen Jing-Biao(陈景标)
中国物理B . 2009, (8): 3395 -3403 .  DOI: 10.1088/1674-1056/18/8/045