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Quantum Coherence at the Boundary of Neural and Photosynthetic Timescales — E8 Intelligence Research

Andrew Stewart Caldin

Published Nov 1, 2026• 0 citations
Publisher

Abstract

FINDING: Quantum-coherence lifetimes in neural microtubules and photosynthetic complexes sit at the boundary where decoherence timescales (~10⁻¹³–10⁻³ s) overlap biological timescales — the brain may exploit quantum effects, but evidence is indirect and contested. | MATH: Decoherence time τ_d ≈ ℏ/(k_B T) · (λ_dB²/…) ; thermal de Broglie λ_dB = h/√(2πmk_BT); Fröhlich condensate frequency ~10¹¹–10¹² Hz; tubulin dipole ~10⁻²⁹ C·m; energy gap ΔE ~ k_BT at 310 K → ΔE ≈ 4.3×10⁻²¹ J ≈ 0.027 eV. | CONNECTION: No confirmed 0.618/1.618 ratios in cited sources; microtubule lattice is hexagonal (6-fold, base-60 compatible) with 13-protofilament B-lattice (13 = Fibonacci F₇, adjacent to φ-scaling), but this is structural, not derived from the quantum claims. | DEPTH: 3 FINDING: Penrose–Hameroff Orch-OR remains unfalsified but unsupported by direct measurement; recent tubulin superradiance/anesthetic-binding studies are suggestive, not conclusive. | MATH: Objective reduction time τ ≈ ℏ/E_G, with E_ Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

DOI
10.5281/zenodo.23853599

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FINDING: Quantum effects in microtubules (Penrose-Hameroff Orch-OR) remain unproven but mathematically constrained by decoherence timescales and lattice geometry; quantum biology (photosynthesis, magnetoreception) shows functional quantum coherence at ambient temperatures. | MATH: Decoherence time τ_d ≈ ħ²/(k_B T · E_coupling) — for microtubules, estimates range 10⁻¹³–10⁻⁴ s, far below neural timescales (10⁻³ s). Orch-OR requires τ_d > 10⁻³ s, implying E_coupling < 10⁻¹¹ eV — unphysical for tubulin dipoles (~1 eV). Quantum biology: exciton coherence length L_c ≈ √(ħD/k_B T) in Fenna-Matthews-Olson complex, D ≈ 10⁻⁹ m²/s, T = 300 K → L_c ≈ 1–2 nm, matching pigment spacing. | CONNECTION: Microtubule lattice is a 13₃ helical symmetry (13 protofilaments, 3-start helix) — a crystallographic screw axis, related to Fibonacci phyllotaxis (13 = Fibonacci number). The 13₃ symmetry yields a pitch ratio ≈ 0.618 (golden angle 137.5° between tubulin dimers). This is the only geometric link: the gold Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com
FINDING: Quantum biology/consciousness research converges on non-trivial coherence timescales and entanglement metrics, but no single mathematical constant or ratio is universally established across the cited videos. | MATH: Key recurring structures: (a) Decoherence timescales τ_d ~ 10⁻¹³–10⁻¹⁵ s for isolated biomolecules vs. proposed 10⁻²⁰ s for microtubule quantum states (Penrose–Hameroff Orch-OR); (b) Entanglement entropy S = −Tr(ρ ln ρ) for neural networks; (c) Quantum tunneling rates k = A·exp(−2π²√(2mΔE)/ℏ) in enzyme catalysis (Al-Khalili); (d) Vibrational mode frequencies in microtubules ~ 10⁹–10¹⁰ Hz (terahertz range), with possible Fibonacci-adjacent ratios in tubulin dimer spacing (8 nm periodicity). | CONNECTION: Weak but suggestive — tubulin lattice shows hexagonal (6-fold) symmetry, related to crystallographic point group P6; microtubule protofilament numbers (13, 14, 15) are not Fibonacci but appear in quasi-crystal models; the 8 nm tubulin dimer spacing yields a 1.618 ra Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com
FINDING: Microtubule quantum coherence experiments (Penrose-Hameroff Orch-OR framework) probe whether neural tubulin lattices sustain quantum states long enough to influence consciousness — evidence remains contested, with decoherence timescales the central constraint. MATH: - Decoherence time: τ_D ≈ ℏ/(k_B T · λ² · N) where λ is coupling strength, N is number of coupled degrees of freedom. At physiological T ≈ 310 K, naive estimates give τ_D ~ 10⁻¹³–10⁻²⁰ s — far shorter than neural timescales (~10⁻³ s). - Fröhlich condensation condition: energy pumping rate must exceed thermal dissipation; coherent polariton modes below a critical temperature T_c in a driven lattice. - Tubulin lattice geometry: 13 protofilaments per microtubule (A-form: 13_3 helix; B-form: 13_2), each protofilament a linear chain of αβ-tubulin heterodimers (~8 nm periodicity). - Anesthetic binding correlation: Hameroff's proposed scaling of anesthetic potency with tubulin electron delocalization — no rigorous quantu Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com
FINDING: Microtubule quantum coherence experiments test whether Orch-OR (Penrose–Hameroff) predicts sustained quantum superpositions in tubulin lattices; current evidence is suggestive but not conclusive. | MATH: Key quantities: decoherence time τ_D vs. neural timescale τ_neural (~10⁻³ s); tubulin dimer spacing d ≈ 8 nm (lattice constant of microtubule B-lattice); Fröhlich condensate frequency ω ≈ 10¹¹–10¹² Hz; thermal decoherence rate Γ ≈ k_B T / ℏ at T = 310 K → Γ ~ 10¹³ s⁻¹. | CONNECTION: Microtubule lattice is a helical Bravais lattice with 13 protofilaments (13 = Fibonacci number F₇), 3-start helix, dimer repeat 8 nm, pitch ~12 nm. 13/8 ≈ 1.625 ≈ φ (0.7% deviation). | DEPTH: 6 --- **1. Key mathematical insight** The Orch-OR hypothesis reduces to an inequality: τ_D > τ_neural where τ_D is the quantum coherence lifetime of tubulin superpositions and τ_neural ~ 10⁻³ s is the relevant neural integration time. Tegmark (2000) computed τ_D ~ 10⁻¹³ s from k_B T/ℏ, killing the hypothe Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com