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【摘 要】
：
The experimentally observed special line-shape induced by the interaction between two counter-propagating equal-frequency fields and an Y-type four-level system
【机 构】
：
Department of Physics and Laboratory for Quantum Optics, East China Normal University, Shanghai 2000
【出 处】
：
中国物理(英文版)
【发表日期】
：
2001年1期
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