Multispin coherences and asymptotic similarity of time correlation functions in solids
- Russian Academy of Sciences, Semenov Institute of Chemical Physics (Russian Federation), E-mail: andylun@orc.ru
The time evolution of multispin (n-particle) correlations in solids (the growth in the number of correlated states) observed by means of multiquantum NMR spectroscopy has been investigated. The contributions from the spins of the immediate environment of each of the spins in the lattice to the time correlation functions that describe this evolution are shown to be mutually asymptotically similar. In this case, the infinite system of coupled ordinary differential equations for the time correlation functions turns out to be equivalent to a diffusion-type partial differential equation with a purely imaginary diffusion coefficient. Its analytical solution has been obtained. It is concluded that the evolution of multispin correlations is probably attributable to multiparticle processes among the spins of a 'distant' (with respect to some spin) environment similar to the processes that shape the NMR absorption line wings.
- OSTI ID:
- 21246875
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 108, Issue 6; Other Information: DOI: 10.1134/S1063776109060107; Copyright (c) 2009 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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