BRAIN NEURONS AS QUANTUM COMPUTERS: IN VIVOSUPPORT OF BACKGROUND PHYSICS

A. Bershadskii, E. Dremencov, J. Bershadskii and G. Yadid
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A. Bershadskii: ICAR, P. O. Box 31155, Jerusalem 91000, Israel
E. Dremencov: Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
J. Bershadskii: ICAR, P. O. Box 31155, Jerusalem 91000, Israel
G. Yadid: Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel

International Journal of Modern Physics C (IJMPC), 2003, vol. 14, issue 07, 897-904

Abstract: The question: whether quantum coherent states can sustain decoherence, heating and dissipation over time scales comparable to the dynamical timescales of brain neurons, has been actively discussed in the last years. A positive answer on this question is crucial, in particular, for consideration of brain neurons as quantum computers. This discussion was mainly based on theoretical arguments. In the present paper nonlinear statistical properties of the Ventral Tegmental Area (VTA) of genetically depressive limbic brain are studiedin vivoon the Flinders Sensitive Line of rats (FSL). VTA plays a key role in the generation of pleasure and in the development of psychological drug addiction. We found that the FSL VTA (dopaminergic) neuron signals exhibit multifractal properties for interspike frequencies on the scales where healthy VTA dopaminergic neurons exhibit bursting activity. For high moments the observed multifractal (generalized dimensions) spectrum coincides with the generalized dimensions spectrum calculated for a spectral measure of aquantumsystem (so-called kicked Harper model, actively used as a model of quantum chaos). This observation can be considered as a first experimental (in vivo) indication in the favor of the quantum (at least partially) nature of brain neurons activity.

Keywords: Brain; neuron; quantum; computers; chaos; decoherence; 87.19.La; 87.18.Sn; 87.17.-d (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0129183103005030

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