Symmetric sequence processing in a recurrent neural network model with a synchronous dynamics

Details Symmetric sequence processing in a recurrent neural network model with a synchronous dynamics Symmetric sequence processing in a recurrent neural network model with a synchronous dynamics

2009-08-11

arxiv.org/abs/0908.1547v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Accepted for publication in Journal of Physics A: Mathematical and Theoretical

Scientific paper

The synchronous dynamics and the stationary states of a recurrent attractor neural network model with competing synapses between symmetric sequence processing and Hebbian pattern reconstruction is studied in this work allowing for the presence of a self-interaction for each unit. Phase diagrams of stationary states are obtained exhibiting phases of retrieval, symmetric and period-two cyclic states as well as correlated and frozen-in states, in the absence of noise. The frozen-in states are destabilised by synaptic noise and well separated regions of correlated and cyclic states are obtained. Excitatory or inhibitory self-interactions yield enlarged phases of fixed-point or cyclic behaviour.

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