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Would someone please explain the phenomenon of quantum tunnelling to me... Thanks!
Tunneling is also fairly important in some chemical reactions. Lighter particles have a greater aptitude for tunneling, so it is usually an electron or proton (H+ ion) that tunnels. Usually the "barrier" is space...
In quantum mechanics the barrier is always space.
But what about a particle tunneling?Eh, that should mean restmass..=What I probably should ask is in what way (assuming that it is electrons, not only 'photons' tunneling) a vacuum barrier forbid this electron from materializing in it? Alternatively it is force carriers that tunnel here, meaning 'photons' in which case the question still stands about 'rest mass'. As a photons 'path' experimentally only exist in its sources 'recoil' and subsequent sink(measurement of it) that one meets no problems with me. A wave function makes a lot of sense there.
What is synaptic quantum tunnelling ?
Is protons delocalization in biological systems possible?
Why is classical neuropsychology require quantum biology theory to postulate the existence of synaptic quantum tunnelling in brain activity?
Quote from: tkadm30What is synaptic quantum tunnelling ?I would have to say it is a wild hypothesis at this stage.To demonstrate tunneling, you have to show that there is a potential barrier of some form (necessarily very thin), and that there is some quantum particle which appears on the other side of the barrier without any classical mechanism for getting there.
The synapses of a cell do have a barrier: The cell wall, a dual lipid layer.- It's fairly thick - thicker than you would expect for quantum tunneling.- But it also has a classical mechanism for transmission of ions - the ion channel, which passes through the cell wall.
Experimental analysis of transmitter release by spine synapses of hippocampal pyramidalcells has revealed a remarkably low exocytosis probability per excitatory impulse.Exocytosis as a whole certainly involves macromolecular dynamics (Fig. 5). We propose, however, that it is initiated by a quantum trigger mechanism: An incoming nerve impulse excites some electronic configuration to a metastable level, separated energetically by a potential barrier V(q ) from an unstable state which leads in aunidirectional process to exocytosis.
QuoteWhy is classical neuropsychology require quantum biology theory to postulate the existence of synaptic quantum tunnelling in brain activity?It doesn't.At the atomic scale, all physical, chemical and biological processes depend on quantum effects. Mainstream quantum biology focuses on possible quantum effects at the scale of large molecules (eg chlorophyl) and cellular structures (eg microtubules and muscle movement). Some philosophers have wondered if quantum effects are foundational for consciousness - but at this stage this is pure speculation.If there are ways to achieve biologically useful functions with organic chemicals more effectively using quantum effects than with classical effects (at body temperature), it would not surprise me if biological systems used them. But at this time, I haven't seen evidence for them in synapses.