Continuous Floquet theory in solid-state NMR

Author:

Chávez Matías1ORCID,Ernst Matthias1ORCID

Affiliation:

1. Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland

Abstract

This article presents the application of continuous Floquet theory in solid-state nuclear magnetic resonance (NMR). Continuous Floquet theory extends the traditional Floquet theory to non-continuous Hamiltonians, enabling the description of observable effects not fully captured by the traditional Floquet theory due to its requirement for a periodic Hamiltonian. We present closed-form expressions for computing first- and second-order effective Hamiltonians, streamlining integration with the traditional Floquet theory and facilitating application in NMR experiments featuring multiple modulation frequencies. Subsequently, we show examples of the practical application of continuous Floquet theory by investigating several solid-state NMR experiments. These examples illustrate the importance of the duration of the pulse scheme regarding the width of the resonance conditions and the near-resonance behavior.

Funder

Schweizerischer Nationalfonds Zur Förderung der Wissenschaftlichen Forschung

Publisher

AIP Publishing

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