High-Fidelity Adiabatic Passage by Composite Sequences of Chirped Pulses
High-Fidelity Adiabatic Passage by Composite Sequences of Chirped Pulses
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DOI：
10.1103/physrevlett.106.233001
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发表时间：
2011-06-06
影响因子：
8.6
通讯作者：
Vitanov, Nikolay V.
中科院分区：
文献类型：
--
作者：
Torosov, Boyan T.;Guerin, Stephane;Vitanov, Nikolay V.
本文提出了一种利用具有特定相对相位的频率啁啾脉冲组合序列优化两个量子态之间绝热通道的方法：复合绝热通道（CAP）。通过适当地选择复合相，无论是否存在非绝热耦合，都可以在足够长的序列下将非绝热损失抵消到所需的任何顺序。复合相位的值是通用的，因为它们不依赖于脉冲形状和啁啾。CAP技术的精度和对参数变化的鲁棒性使其适合于高保真量子信息处理。
We present a method for optimization of the technique of adiabatic passage between two quantum states by composite sequences of frequency-chirped pulses with specific relative phases: composite adiabatic passage (CAP). By choosing the composite phases appropriately the nonadiabatic losses can be canceled to any desired order with sufficiently long sequences, regardless of the nonadiabatic coupling. The values of the composite phases are universal for they do not depend on the pulse shapes and the chirp. The accuracy of the CAP technique and its robustness against parameter variations make CAP suitable for high-fidelity quantum information processing.