【作者】 钮月萍； 龚尚庆；

【Author】 NIU Yueping, GONG Shangqing Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China, 201800

【机构】 中国科学院上海光学精密机械研究所；

【摘要】 利用受激拉曼绝热跟随技术,我们探讨了四能级“流形”系统(目标态为两个分裂的子能级)的绝热特性。结果发现:即使在不满足双光子及三光子共振的条件下,由于相干控制场的作用,该系统存在两个暗态。对应于不同的暗态,产生了两个振幅相等、位相差为π的终态子能级的任意相干叠加态。特别是当控制场与目标态的两个子能级共振时,双暗态的存在导致了相互正交的两个最大原子相干叠加态的产生。更多还原

【Abstract】 We discuss the adiabatic properties of four level twofold system using stimulated Raman adiabatic passage technique. Although two-photon and tri-photon resonance are not fulfilled, a control field makes the existence of double dark states. Corresponding to the double dark states, two atomic coherent superposition states with equal amplitudes and inverse phases present. Particularly, when control field is on-resonance, two orthogonal superposition states are created.更多还原