Stimulated Raman adiabatic passage in the presence of dephasing
Stimulated Raman adiabatic passage in the presence of dephasing
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DOI：
10.1063/1.1623482
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发表时间：
2003-11
影响因子：
4.4
通讯作者：
Qiang Shi;Eitan Geva
中科院分区：
文献类型：
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作者：
Qiang Shi;Eitan Geva
探讨了纯消相影响下受激拉曼绝热通道（STIRAP）技术的应用前景。提供了退相干如何影响STIRAP性能的一般分析。从一般的和全量子力学的系统浴哈密顿量出发，我们推导了描述耗散STIRAP系统的约化动力学的量子主方程（QME）。推导基于以下标准假设：(1)弱系统-浴耦合；(2)马可夫性，即弛豫时间较浴槽相关时间τc长；(3)弱场物质相互作用，即驱动激光场的拉比周期Ω−1大于τc。由于弱场-物质相互作用的假设，该QME中的耗散项与没有驱动场时的耗散项相同。这种类型的不可控的减相被认为会降低STIRAP的效率，尽管实际损失强烈地加深…
The prospect of employing the stimulated Raman adiabatic Passage (STIRAP) technique under the influence of pure dephasing is explored. A general analysis of how decoherence influences the performance of STIRAP is provided. Starting from a general and fully quantum-mechanical system–bath Hamiltonian, we derive a quantum master equation (QME) that describes the reduced dynamics of a dissipative STIRAP system. The derivation is based on the standard assumptions of (1) weak system–bath coupling; (2) Markovity, in the sense that the relaxation times are long in comparison to the bath correlation time, τc; and (3) weak field–matter interaction, in the sense that the Rabi period of the driving laser fields, Ω−1, is longer than τc. The dissipative term in this QME is the same as it would have been in the absence of the driving fields, because of the assumption of weak field–matter interaction. This type of uncontrollable dephasing is seen to diminish the efficiency of STIRAP, although the actual loss strongly dep...