Papers › Critical Dynamics and Cyclic Memory Retrieval in Non-reciprocal Hopfield Networks
Critical Dynamics and Cyclic Memory Retrieval in Non-reciprocal Hopfield Networks
Shuyue Xue, Mohammad Maghrebi, George I. Mias, Carlo Piermarocchi
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We study Hopfield networks with non-reciprocal coupling inducing switches between memory patterns. Dynamical phase transitions occur between phases of no memory retrieval, retrieval of multiple point-attractors, and limit-cycle attractors. The limit cycle phase is bounded by two critical regions: a Hopf bifurcation line and a fold bifurcation line, each with unique dynamical critical exponents and sensitivity to perturbations. A Master Equation approach numerically verifies the critical behavior predicted analytically. We discuss how these networks could model biological processes near a critical threshold of cyclic instability evolving through multi-step transitions.
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