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The importance of quantum decoherence in brain processes | | Max Tegmark
; | | Date: |
5 Jul 1999 | | Journal: | Phys.Rev. E61 (2000) 4194-4206 | | Subject: | Quantum Physics; Biological Physics; Neural and Evolutionary Computing; Disordered Systems and Neural Networks | quant-ph cond-mat.dis-nn cs.NE physics.bio-ph q-bio | | Abstract: | Based on a calculation of neural decoherence rates, we argue that that the degrees of freedom of the human brain that relate to cognitive processes should be thought of as a classical rather than quantum system, i.e., that there is nothing fundamentally wrong with the current classical approach to neural network simulations. We find that the decoherence timescales ~10^{-13}-10^{-20} seconds are typically much shorter than the relevant dynamical timescales (~0.001-0.1 seconds), both for regular neuron firing and for kink-like polarization excitations in microtubules. This conclusion disagrees with suggestions by Penrose and others that the brain acts as a quantum computer, and that quantum coherence is related to consciousness in a fundamental way. | | Source: | arXiv, quant-ph/9907009 | | Other source: | [GID 365545] quant-ph/9907009 | | Services: | Forum | Review | PDF | Favorites | |
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