Stark-shift-chirped rapid-adiabatic-passage technique among three states (12 pages)
Stark-shift-chirped rapid-adiabatic-passage technique among three states (12 pages)
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DOI：
10.1103/physreva.72.053403
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发表时间：
2005-11
影响因子：
2.9
通讯作者：
L. Yatsenko;A. Rangelov;N. Vitanov
中科院分区：
文献类型：
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作者：
L. Yatsenko;A. Rangelov;N. Vitanov
我们证明了stark啁啾快速绝热通道SCRAP技术，迄今为止用于两个量子态之间的完全种群转移，为原子和分子的三个状态之间的完全种群转移提供了一种简单而强大的方法。在这种情况下，SCRAP使用三个激光脉冲：一个强的远谐振脉冲通过诱导动态斯塔克位移来改变跃迁频率，从而在三个绝热状态之间产生与时间相关的平交，而近谐振和中等强度的泵浦和斯托克斯脉冲，在适当的时间上抵消，通过绝热通道驱动初始状态和最终状态之间的人口。种群转移效率对激光强度的变化是稳健的，只要这些强度足够大，以强制绝热演化。与受激拉曼绝热通道STIRAP一样，适当的脉冲时间可以使可能衰减的中间态的居群最小化。该技术既适用于单光子跃迁，也适用于多光子跃迁，也适用于非均匀展宽的介质；这些特性通过克服伴随多光子跃迁的不可避免的动态斯塔克位移以及不必要的失谐，例如由多普勒频移引起的失谐，代表了STIRAP的明显优势。
We show that the technique of Stark-chirped rapid adiabatic passage SCRAP, hitherto used for complete population transfer between two quantum states, offers a simple and robust method for complete population transfer amongst three states in atoms and molecules. In this case SCRAP uses three laser pulses: a strong far-off-resonant pulse modifies the transition frequencies by inducing dynamic Stark shifts and thereby creating time-dependent level crossings amongst the three diabatic states, while near-resonant and moderately strong pump and Stokes pulses, appropriately offset in time, drive the population between the initial and final states via adiabatic passage. The population transfer efficiency is robust to variations in the intensities of the lasers, as long as these intensities are sufficiently large to enforce adiabatic evolution. With suitable pulse timings the population in the possibly decaying intermediate state can be minimized, as with stimulated Raman adiabatic passage STIRAP. This technique applies to one-photon as well as multiphoton transitions and it is also applicable to media exhibiting inhomogeneous broadening; these features represent clear advantages over STIRAP by overcoming the inevitable dynamical Stark shifts that accompany multiphoton transitions as well as unwanted detunings, e.g., induced by Doppler shifts.