Noise-controlled signal transmission in a multithread semiconductor neuron

Reference:

Samardak, A., Nogaret, A., Janson, N. B., Balanov, A. G., Farrer, I. and Ritchie, D. A., 2009. Noise-controlled signal transmission in a multithread semiconductor neuron. Physical Review Letters, 102 (22), 226802.

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Official URL:

http://dx.doi.org/10.1103/PhysRevLett.102.226802

Abstract

We report on stochastic effects in a new class of semiconductor structures that accurately imitate the electrical activity of biological neurons. In these devices, electrons and holes play the role of K+ and Na+ ions that give the action potentials in real neurons. The structure propagates and delays electrical pulses via a web of spatially distributed transmission lines. We study the transmission of a periodic signal through a noisy semiconductor neuron. Using experimental data and a theoretical model we demonstrate that depending on the noise level and the amplitude of the useful signal, transmission is enhanced by a variety of nonlinear phenomena, such as stochastic resonance, coherence resonance, and stochastic synchronization.

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