Computational and experimental studies of spin chaos in magnetic resonance

Susie Yi Huang; Yung-Ya Lin

doi:10.1117/12.512622

30 December 2003 Computational and experimental studies of spin chaos in magnetic resonance

Susie Yi Huang, Yung-Ya Lin

Proceedings Volume 5200, Applications and Science of Neural Networks, Fuzzy Systems, and Evolutionary Computation VI; (2003) https://doi.org/10.1117/12.512622
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Two prevalent interactions in high-field solution magnetic resonance -radiation damping and the dipolar field - are shown to generate instability in spin systems with bulk magnetization. The instability is studied numerically by computing the largest Lyapunov exponent associated with the long-time spin dynamics, which is shown to be positive. An algorithm for investigating dynamical fluctuations in a spatiotemporally chaotic spin system is presented, and the finite-time largest Lyapunov exponents are calculated to gain insight into the growth rates of the system as a function of time. Numerical simulations and experimental results are compared to account for the appearance of experimental anomalies observed in multiple spin echo and pulsed gradient spin echo experiments.

Citation Download Citation

Susie Yi Huang and Yung-Ya Lin "Computational and experimental studies of spin chaos in magnetic resonance", Proc. SPIE 5200, Applications and Science of Neural Networks, Fuzzy Systems, and Evolutionary Computation VI, (30 December 2003); https://doi.org/10.1117/12.512622

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