Investigation of the Effect of Finite Pulse Errors on BABA Pulse Sequence Using Floquet-Magnus Expansion Approach.

Investigation of the Effect of Finite Pulse Errors on BABA Pulse Sequence Using Floquet-Magnus Expansion Approach.
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DOI:
10.1080/00268976.2012.718379
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发表时间:
2013
期刊:
影响因子:
1.7
通讯作者:
Reid AE
Reid AE
中科院分区:
化学4区
文献类型:
--
作者:
Mananga ES;Reid AE

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利用Floquet-Magnus展开方法研究了有限脉冲宽度的BABA脉冲序列。在FME格式中,一阶F1与平均哈密顿理论(AHT)和Floquet理论(FT)中的对应物是相同的。然而,FME方法中的定时部分经由在其他方案中不存在的Λ1(t)函数引入。该函数提供了一种简单的方法,通过与演化的定时部分相连的算子的马格努斯展开来评估“之间的时间”期间的自旋演化。对Λ1(t)的估计对于非频闪演化的分析特别有用。这里,忽略了边界条件的重要性,它提供了Λ1(0)的自然选择。本文利用Λ1(t)函数比较了δ脉冲和有限脉冲的BABA脉冲序列的效率。给出了Λ1(t)和F1的计算。
This paper presents the study of finite pulse widths for the BABA pulse sequence using the Floquet-Magnus expansion (FME) approach. In the FME scheme, the first order F1 is identical to its counterparts in average Hamiltonian theory (AHT) and Floquet theory (FT). However, the timing part in the FME approach is introduced via the Λ1 (t) function not present in other schemes. This function provides an easy way for evaluating the spin evolution during “the time in between” through the Magnus expansion of the operator connected to the timing part of the evolution. The evaluation of Λ1 (t) is useful especially for the analysis of the non-stroboscopic evolution. Here, the importance of the boundary conditions, which provides a natural choice of Λ1 (0) is ignored. This work uses the Λ1 (t) function to compare the efficiency of the BABA pulse sequence with δ – pulses and the BABA pulse sequence with finite pulses. Calculations of Λ1 (t) and F1 are presented.
DOI: 10.1016/0022-2364(84)90331-7
发表时间: 1984-01-01
影响因子: 2.2
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