Use of composite rotations to correct systematic errors in NMR quantum computation
Use of composite rotations to correct systematic errors in NMR quantum computation
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DOI：
10.1088/1367-2630/2/1/006
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发表时间：
2000-03-30
影响因子：
3.3
通讯作者：
Jones, JA
中科院分区：
文献类型：
--
作者：
Cummins, HK;Jones, JA
我们实现了一个系综量子计数算法的三个NMR谱仪与H-1共振频率为500，600和750 MHz。在更高的频率下，结果明显偏离天真的理论预测。这些系统误差几乎可以完全归因于非共振效应，这可以通过使用最初由Tycko开发的完全补偿复合旋转脉冲序列来基本上校正。我们还推导出一个解析表达式生成这样的序列与任意旋转角度。
We implement an ensemble quantum counting algorithm on three NMR spectrometers with H-1 resonance frequencies of 500, 600 and 750 MHz. At higher frequencies, the results deviate markedly from naive theoretical predictions. These systematic errors can be attributed almost entirely to off-resonance effects, which can be substantially corrected for using fully compensating composite rotation pulse sequences originally developed by Tycko. We also derive an analytic expression for generating such sequences with arbitrary rotation angles.