Dipolar coupling spin dynamics: Perturbation approach Academic Article uri icon

abstract

  • A perturbation method is presented which can be applied to the description of a wide range of physical problems that deal with dynamics of dipolarly coupled spins in solids. The method is based on expansion of {\rm e}^{{\cal A}+{\cal B}} in a perturbation series. As an example of the application of the method, the multiple-quantum coherence dynamics in three-and four-spin clusters are considered. The calculated 0Q and 2Q intensities versus the duration of the preparation period give close agreement with exact results and simulations data. The exact solutions for J 0Q and J 2Q coherences in four-spin systems are obtained.

publication date

  • January 1, 2004