Dynamical Phase Transitions In Driven Integrate-And-Fire Neurons

Details Dynamical Phase Transitions In Driven Integrate-And-Fire Neurons Dynamical Phase Transitions In Driven Integrate-And-Fire Neurons

2007-10-01

arxiv.org/abs/0710.0391v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures

Scientific paper

We explore the dynamics of an integrate-and-fire neuron with an oscillatory stimulus. The frustration due to the competition between the neuron's natural firing period and that of the oscillatory rhythm, leads to a rich structure of asymptotic phase locking patterns and ordering dynamics. The phase transitions between these states can be classified as either tangent or discontinuous bifurcations, each with its own characteristic scaling laws. The discontinuous bifurcations exhibit a new kind of phase transition that may be viewed as intermediate between continuous and first order, while tangent bifurcations behave like continuous transitions with a diverging coherence scale.

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