Chaotic dynamics and spin correlation functions in a chain of nanomagnets

@article{Chotorlishvili2011ChaoticDA,
  title={Chaotic dynamics and spin correlation functions in a chain of nanomagnets},
  author={Levan Chotorlishvili and Z. Toklikishvili and Andreas Komnik and Jamal Berakdar},
  journal={Physical Review B},
  year={2011},
  volume={83},
  pages={184405}
}
We study a chain of coupled nanomagnets in a classical approximation. We show that the infinitely long chain of coupled nanomagnets can be equivalently mapped onto an effective one-dimensional Hamiltonian with a fictitious time-dependent perturbation. We establish a connection between the dynamical characteristics of the classical system and spin correlation time. The decay rate for the spin correlation functions turns out to depend logarithmically on the maximal Lyapunov exponent. Furthermore… 
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