Knowledge Tree
Relations (1)
related 0.60 — strongly supporting 6 facts
The relationship exists because quantum decoherence is a central theoretical challenge to the hypothesis that quantum processes occur within the brain, as evidenced by the warm, wet environment's tendency to cause rapid decoherence {fact:2, fact:3, fact:5}. Researchers have proposed mechanisms like Posner molecules [1] or specific recoherence models [2] to explain how quantum states might persist in the brain despite these decoherence constraints [3].
Facts (6)
Sources
Quantum Approaches to Consciousness plato.stanford.edu 2 facts
measurementA revised version of Max Tegmark's model of quantum decoherence in the brain provides decoherence times of 10 to 100 microseconds, which proponents of the Penrose-Hameroff model argue can be extended to the neurophysiologically relevant range of 10 to 100 milliseconds under specific assumptions.
claimTheoretical studies of interacting spins demonstrate that entangled states can be maintained in noisy open quantum systems at high temperatures and far from thermal equilibrium by using a 'recoherence' mechanism to counterbalance decoherence, suggesting entanglement may persist in environments like the brain.
Quantum Mechanics And Consciousness: The Physics Of Mind quantumzeitgeist.com 2 facts
claimQuantum coherence is highly sensitive to environmental interference, a process known as decoherence, which poses a significant challenge to the plausibility of quantum states surviving in the brain's warm and wet environment.
claimThe Orchestrated Objective Reduction (Orch OR) hypothesis faces scientific skepticism and challenges regarding the maintenance of quantum coherence in the brain's warm, wet environment, a process known as decoherence.
Theories and Methods of Consciousness biomedres.us 1 fact
claimQuantum mechanical hypotheses of consciousness face the challenge of quantum decoherence, which suggests that quantum processes would dissipate into the environment over time because the brain is not a closed system cold enough to maintain coherence.
Quantum Approaches to Consciousness plato.stanford.edu 1 fact
claimFisher (2015, 2017) proposed that Posner molecules, specifically calcium phosphate (Ca9(PO4)6), act as qubits in the brain where nuclear spins of phosphate ions protect coherent states against fast decoherence.