Phosphorus Nuclear Spin Qubits for Sustained Quantum Coherence in Neural Networks — E8 Intelligence Research

FINDING: Matthew Fisher proposes nuclear spin of phosphorus atoms as a qubit substrate for quantum processing in neural networks, with specific decoherence times and molecular binding geometries enabling sustained quantum coherence. MATH: - Phosphorus nuclear spin: I = 1/2 (qubit) - Decoherence time scale for nuclear spins in biological environment: ~1 second (Fisher's estimate, based on NMR relaxation rates) - Key molecular candidate: Posner molecule (Ca₉(PO₄)₆) — symmetry group: trigonal (likely D₃h or C₃v) - Quantum entanglement lifetime in Posner clusters: predicted > 1 second due to spin shielding by calcium ions - Fisher's quantum cognition model requires: - Entanglement swapping between Posner molecules - Rate of quantum processing: ~10–100 Hz (compatible with neural firing rates) - No explicit equation for consciousness given; model is a quantum information processing framework. CONNECTION: - Posner molecule geometry: 6 phosphate groups arranged around c Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com