Low-dimensional chaos induced by frustration in a non-monotonic system

Details Low-dimensional chaos induced by frustration in a non-monotonic system Low-dimensional chaos induced by frustration in a non-monotonic system

2002-05-23

arxiv.org/abs/cond-mat/0205471v2

Europhysics Letters, Vol. 62 No. 5, pp.657-663 (2003)

Physics

Condensed Matter

Disordered Systems and Neural Networks

2 figures

Scientific paper

10.1209/epl/i2003-00424-4

We report a novel mechanism for the occurrence of chaos at the macroscopic level induced by the frustration of interaction, namely frustration-induced chaos, in a non-monotonic sequential associative memory model. We succeed in deriving exact macroscopic dynamical equations from the microscopic dynamics in the case of the thermodynamic limit and prove that two order parameters dominate this large-degree-of-freedom system. Two-parameter bifurcation diagrams are obtained from the order-parameter equations. Then we analytically show that the chaos is low-dimensional at the macroscopic level when the system has some degree of frustration, but that the chaos definitely does not occur without the frustration.

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