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arXiv · 0804.3087

Controlling coherence using the internal structure of hard pi pulses

Yanqun Dong·R. G. Ramos·Dale Li·S. E. Barrett
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Abstract

The tiny difference between hard pi pulses and their delta-function approximation can be exploited to control coherence. Variants on the magic echo that work despite a large spread in resonance offsets are demonstrated using the zeroth- and first-order average Hamiltonian terms, for 13-C NMR in C60. The 29-Si NMR linewidth of Silicon has been reduced by a factor of about 70,000 using this approach, which also has potential applications in magnetic resonance microscopy and imaging of solids.

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Yanqun Dong, R. G. Ramos, Dale Li, S. E. Barrett. 2008-04-18. Controlling coherence using the internal structure of hard pi pulses. https://doi.org/10.1103/physrevlett.100.247601

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