Abstract
The results of several experiments on the dynamics of paramagnetic spin systems are analyzed on the basis of the theory developed here. It is shown that the asymptotic expressions for time correlation functions of various (high) orders are mutually similar and have a characteristic form [18], which probably indicates the “forgetting” of the initial conditions due to the development of Lyapunov instability in the dynamic system. The existence of exponential functions with close exponents, which describe the damping of correlations in the experimental observation of signals from free NMR precession and their buildup in experiments on multiquantum NMR, are manifestations of this instability because the Lyapunov exponents exist in pairs. The results suggest the development of “deterministic chaos” in the systems under investigation.
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Original Russian Text © V.L. Bodneva, A.A. Lundin, 2013, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 143, No. 6, pp. 1217–1224.
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Bodneva, V.L., Lundin, A.A. Manifestation of dynamic chaos in spin-spin relaxation processes in a solid. J. Exp. Theor. Phys. 116, 1050–1056 (2013). https://doi.org/10.1134/S1063776113060022
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DOI: https://doi.org/10.1134/S1063776113060022