dorsal/arxiv
View SchemaUltra-broadband Heteronuclear Hartmann-Hahn polarization transfer
| Authors | Xijia Miao |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0203079 |
| URL | https://arxiv.org/abs/quant-ph/0203079 |
Abstract
It is showed on the basis of the multiple-quantum operator algebra space formalism that ultra-broadband heteronuclear Hartmann-Hahn polarization transfer could be achieved by the amplitude- and frequency-modulation quasi-adiabatic excitation (90 degree) pulses, while it is usually difficult for the adiabatic inversion pulses to achieve effectively broadband Hartmann-Hahn transfer in a heteronuclear coupled two-spin system. The adiabatic and quasi-adiabatic pulses have an important property that within their activation bandwidth flip angle of the pulses is independent of the pulse duration and the bandwidth increases as the pulse duration. This property is importanr for construction of the heteronuclear Hartmann-Hahn transfer sequences with the quasi-adiabatic 90 degree pulses. Theoretic analysis and numerical simulation show that the heteronuclear Hartmann-Hahn transfer is performed in the even-order multiple- quantum operator algebra subspace of the two-spin system. The multiple-quantum operator algebra space formalism may give a powerful guide to the construction of ultra- broadband heteronuclear Hartmann-Hahn transfer sequences with the quasi-adiabatic 90 degree pulses.
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"abstract": "It is showed on the basis of the multiple-quantum operator algebra space\nformalism that ultra-broadband heteronuclear Hartmann-Hahn polarization\ntransfer could be achieved by the amplitude- and frequency-modulation\nquasi-adiabatic excitation (90 degree) pulses, while it is usually difficult\nfor the adiabatic inversion pulses to achieve effectively broadband\nHartmann-Hahn transfer in a heteronuclear coupled two-spin system. The\nadiabatic and quasi-adiabatic pulses have an important property that within\ntheir activation bandwidth flip angle of the pulses is independent of the pulse\nduration and the bandwidth increases as the pulse duration. This property is\nimportanr for construction of the heteronuclear Hartmann-Hahn transfer\nsequences with the quasi-adiabatic 90 degree pulses. Theoretic analysis and\nnumerical simulation show that the heteronuclear Hartmann-Hahn transfer is\nperformed in the even-order multiple- quantum operator algebra subspace of the\ntwo-spin system. The multiple-quantum operator algebra space formalism may give\na powerful guide to the construction of ultra- broadband heteronuclear\nHartmann-Hahn transfer sequences with the quasi-adiabatic 90 degree pulses.",
"arxiv_id": "quant-ph/0203079",
"authors": [
"Xijia Miao"
],
"categories": [
"quant-ph"
],
"title": "Ultra-broadband Heteronuclear Hartmann-Hahn polarization transfer",
"url": "https://arxiv.org/abs/quant-ph/0203079"
},
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