Subluminal to superluminal light propagation in a V-type three-level atomic system interacting with squeezed vacuum
张琴, 屈光辉, 唐远河, 金康, 纪卫莉
中国物理B . 2012, (2): 23201 -023201 .  DOI: 10.1088/1674-1056/21/2/023201