Controlling coherence using the internal structure of hard pi pulses

Details Controlling coherence using the internal structure of hard pi pulses Controlling coherence using the internal structure of hard pi pulses

2008-04-18

arxiv.org/abs/0804.3087v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 color figures

Scientific paper

10.1103/PhysRevLett.100.247601

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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