Quantum physics creates consciousness | Stuart Hameroff

Quick Overview

Stuart Hameroff proposes that consciousness arises from quantum processes within neuronal microtubules, specifically through Objective Reduction (OR) events occurring at the Planck scale, suggesting that the structure and function of microtubules, including their $\pi$-resonance groups, are fundamental to subjective experience, effectively reversing the Copenhagen interpretation by positing that collapse causes consciousness.

Key Points: Hameroff discusses the question of when consciousness appeared, suggesting it might be tied to the Cambrian explosion around 540 million years ago, or even earlier. He links consciousness to microtubules, noting that Alzheimer's disease involves disintegrating microtubules due to tau protein tangles. Hameroff advocates for Roger Penrose's idea that quantum superposition (wave-like, small scale) collapses into definite states (particle-like, large scale) via Objective Reduction (OR) due to gravitational self-interaction at the Planck scale. The OR events, which Hameroff associates with 'BING!!' moments, are proposed to generate primitive qualia or feelings, contrasting with the Copenhagen interpretation where consciousness causes collapse. Recent research (Kalra et al., 2023) suggests microtubules are efficient light harvesters whose quantum effects are inhibited by anesthetics like etomidate and isoflurane. He posits that life evolved behavior to optimize OR-mediated pleasure (the 'quantum pleasure principle'), suggesting pleasure is a fundamental feedback mechanism based on optimizing $\pi$-resonance groups in microtubules.

Context: The video features Stuart Hameroff, an anesthesiologist and consciousness researcher, presenting his theory that consciousness is rooted in quantum mechanics occurring within neuronal microtubules. He references the timeline of life's evolution, the mechanism of Alzheimer's disease involving microtubule breakdown, and Roger Penrose's theory of Objective Reduction (OR) as the physical basis for consciousness, contrasting this with standard interpretations of quantum mechanics.