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Quantum models of the mind: are they compatible with environment decoherence?
Luiz Pinguelli Rosa1, Jean Faber
1Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering, CT, COPPE, University of Rio de Janeiro, RJ, Brazil. lpr@adc.coppe.ufrj.br
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 5, 2004
Summary
Quantum brain models suggest consciousness arises from quantum states. This study argues against Penrose
Area of Science:
- Neuroscience
- Quantum Physics
- Philosophy of Mind
Background:
- Quantum mechanics offers potential explanations for consciousness.
- The Hameroff-Penrose model proposes consciousness arises from quantum computations in microtubules.
- Tegmark's work questions quantum brain theories based on decoherence times.
Purpose of the Study:
- To evaluate the Hameroff-Penrose model in light of quantum decoherence.
- To propose an alternative mechanism for decoherence in quantum brain models.
- To address discrepancies between quantum brain theories and decoherence calculations.
Main Methods:
- Critical analysis of the Hameroff-Penrose model's reliance on orchestrated objective reduction (OOR).
- Exploration of environmental interactions as a cause for decoherence.
- Review of decoherence time calculations and their implications for quantum brain models.
Main Results:
- The Hameroff-Penrose model, with its OOR mechanism, is incompatible with decoherence.
- Decoherence caused by environmental interactions offers a viable alternative for quantum brain models.
- Disagreement with Tegmark's conclusion that decoherence refutes all quantum brain theories.
Conclusions:
- Quantum brain theories can be sustained by replacing gravitational collapse with environmental decoherence.
- The Hameroff-Penrose model requires significant revision or rejection.
- Further research is needed to reconcile quantum mechanics with brain function and consciousness.