Research

Regular pulsing induced by noise in a monolithic semiconductor neuron


Reference:

Samardak, A. S., Nogaret, A., Taylor, S., Janson, N. B., Balanov, A. G., Farrer, I. and Ritchie, D. A., 2009. Regular pulsing induced by noise in a monolithic semiconductor neuron. In: Caldas, M. J. and Studart, N., eds. Physics of Semiconductors. Vol. 1199. Melville: American Institute of Physics, pp. 523-524. (AIP Conference Proceedings)

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Official URL:

http://dx.doi.org/10.1063/1.3295539

Abstract

We report on the stochastic dynamics of a semiconductor neuron that uses the non-linear conductances of modulation doped semiconductors to compute electrical spikes. This GaAs-based neuron has pn wires which propagate and delay electrical pulses and a soma which sums and regenerates pulses through the positive feedback of a quantum tunnel amplifier vertically integrated with the wire. The neuron exhibits the property of excitability: it responds with a spike to a perturbation that exceeds a certain threshold value, and remains silent if the perturbation is small. When exciting the neuron with a sub-threshold periodic signal, a superimposed random noise is shown to enhance the coherence of the output pulse train. We perform a systematic study of stochastic resonance and coherence resonance as a function of excitation parameters and analyze output spectra using statistical tools.

Details

Item Type Book Sections
CreatorsSamardak, A. S., Nogaret, A., Taylor, S., Janson, N. B., Balanov, A. G., Farrer, I. and Ritchie, D. A.
EditorsCaldas, M. J.and Studart, N.
DOI10.1063/1.3295539
DepartmentsFaculty of Science > Physics
RefereedNo
StatusPublished
ID Code21087
Additional Information29th International Conference on Physics of Semiconductors. 27 July - 1 August 2008. Rio de Janeiro, Brazil.

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