The importance of quantum decoherence in brain processes

@article{Tegmark2000TheIO,
  title={The importance of quantum decoherence in brain processes},
  author={Max Tegmark},
  journal={Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics},
  year={2000},
  volume={61 4 Pt B},
  pages={
          4194-206
        }
}
  • Max Tegmark
  • Published 2000
  • Physics, Computer Science, Biology, Medicine
  • Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Based on a calculation of neural decoherence rates, we argue 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 time scales ( approximately 10(-13)-10(-20) s) are typically much shorter than the relevant dynamical time scales ( approximately 10(-3)-10(-1) s… Expand
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References

SHOWING 1-10 OF 140 REFERENCES
Decoherence and the Appearance of a Classical World in Quantum Theory
1 Introduction.- 2 Basic Concepts and Their Interpretation.- 3 Decoherence Through Interaction with the Environment.- 4 Decoherence in Quantum Field Theory and Quantum Gravity.- 5 Consistent… Expand
Computation and Neural Systems
Computational neuroscience is best defined by its focus on understanding the nervous systems as a computational device rather than by a particular experimental technique. Accordinlgy, while the… Expand
Mind, matter, and quantum mechanics
A theory of psychophysical phenomena is proposed. It resolves simultaneously four basic problems of science, namely the problems of the connections between:(1) mind and matter,(2) quantum theory and… Expand
The Large, the Small and the Human Mind
From the Publisher: Roger Penrose's views on the large-scale physics of the universe, the small-scale world of quantum physics and the physics of the mind are controversial and widely discussed. The… Expand
The Arrow of Time
IT is widely believed that all irreversible mechanical processes involve an increase of entropy, and that ‘classical’ (that is, non-statistical) mechanics, of continuous media as well as of… Expand
Statistical Mechanics:
AbstractPROF. R. H. FOWLER'S monumental work on statistical mechanics has, in this the second edition, in his own modest words, been rearranged and brought more up to date. But the new volume is much… Expand
Phase Space Picture of Quantum Mechanics: Group Theoretical Approach
This book covers the theory and applications of the Wigner phase space distribution function and its symmetry properties. The book explains why the phase space picture of quantum mechanics is needed,… Expand
The Principles of Psychology
I.TO give readers some idea of the contents of a good book is very often the most useful thing a reviewer can do. Unfortunately that course is not open to us in the present instance. The subject is… Expand
Ultimate computing - biomolecular consciousness and nanotechnology
TLDR
The Origin and Evolution of Life, From Brain to Cytoskeleton, and the Future of Consciousness: Towards Ultimate Computing. Expand
"J."
however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)… Expand
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