Our Brains Use Quantum Computation

Summary: Study suggests quantum processes are part of cognitive and conscious brain functions.

Source: TCD

Scientists from Trinity College Dublin believe our brains could use quantum computation after adapting an idea developed to prove the existence of quantum gravity to explore the human brain and its workings.

The brain functions measured were also correlated to short-term memory performance and conscious awareness, suggesting quantum processes are also part of cognitive and conscious brain functions. 

If the team’s results can be confirmed – likely requiring advanced multidisciplinary approaches –they would enhance our general understanding of how the brain works and potentially how it can be maintained or even healed. They may also help find innovative technologies and build even more advanced quantum computers.

Dr Christian Kerskens, lead physicist at the Trinity College Institute of Neuroscience (TCIN), is the co-author of the research article that has just been published in the Journal of Physics Communications. 

He said: 

“We adapted an idea, developed for experiments to prove the existence of quantum gravity, whereby you take known quantum systems, which interact with an unknown system. If the known systems entangle, then the unknown must be a quantum system, too. It circumvents the difficulties to find measuring devices for something we know nothing about.

“For our experiments we used proton spins of ‘brain water’ as the known system. ‘Brain water’ builds up naturally as fluid in our brains and the proton spins can be measured using MRI (Magnetic Resonance Imaging). Then, by using a specific MRI design to seek entangled spins, we found MRI signals that resemble heartbeat evoked potentials, a form of EEG signals. EEGs measure electrical brain currents, which some people may recognise from personal experience or simply from watching hospital dramas on TV.”

Electrophysiological potentials like the heartbeat evoked potentials are normally not detectable with MRI and the scientists believe they could only observe them because the nuclear proton spins in the brain were entangled. 

Dr Kerskens added:

“If entanglement is the only possible explanation here then that would mean that brain processes must have interacted with the nuclear spins, mediating the entanglement between the nuclear spins. As a result, we can deduce that those brain functions must be quantum. 

This shows the outline of a head and a brain
The brain functions measured were also correlated to short-term memory performance and conscious awareness, suggesting quantum processes are also part of cognitive and conscious brain functions. Image is in the public domain

“Because these brain functions were also correlated to short-term memory performance and conscious awareness, it is likely that those quantum processes are an important part of our cognitive and conscious brain functions.  

“Quantum brain processes could explain why we can still outperform supercomputers when it comes to unforeseen circumstances, decision making, or learning something new. Our experiments performed only 50 metres away from the lecture theatre, where Schrödinger presented his famous thoughts about life, may shed light on the mysteries of biology, and on consciousness which scientifically is even harder to grasp.”

Funding: This research was supported by Science Foundation Ireland and TCIN.

About this neuroscience research news

Author: Thomas Deane
Source: TCD
Contact: Thomas Deane – TCD
Image: The image is in the public domain

Original Research: Open access.
Experimental indications of non-classical brain functions” by Christian Kerskens et al. Journal of Physics Communication


Experimental indications of non-classical brain functions

Recent proposals in quantum gravity have suggested that unknown systems can mediate entanglement between two known quantum systems, if the mediator itself is non-classical. This approach may be applicable to the brain, where speculations about quantum operations in consciousness and cognition have a long history.

Proton spins of bulk water, which most likely interfere with any brain function, can act as the known quantum systems. If an unknown mediator exists, then NMR methods based on multiple quantum coherence (MQC) can act as an entanglement witness.

However, there are doubts that today’s NMR signals can contain quantum correlations in general, and specifically in the brain environment.

Here, we used a witness protocol based on zero quantum coherence (ZQC) where we minimized the classical signals to circumvent the NMR detection limits for quantum correlation.

For short repetitive periods, we found evoked signals in most parts of the brain, whereby the temporal appearance resembled heartbeat-evoked potentials (HEPs). We found that those signals had no correlates with any classical NMR contrast. Similar to HEPs, the evoked signal depended on conscious awareness.

Consciousness-related or electrophysiological signals are unknown in NMR. Remarkably, these signals only appeared if the local properties of the magnetization were reduced.

Our findings suggest that we may have witnessed entanglement mediated by consciousness-related brain functions.

Those brain functions must then operate non-classically, which would mean that consciousness is non-classical.

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  1. Why wouldn’t our brain use quantum effects? We know that chlorophyll reactions in plants use quantum effects to convert photon energy into chemical energy.

  2. Is it possible for this to happen to you during a neck and spine surgery without your knowledge or consent? I’ve been trying to figure out if an invasive bci procedure has been done to me by a neurosurgeon in Columbus Ohio during a surgery. But it’s been out ruled medically by a CT scan and x-ray.
    What test do I need to show that the protons in my brain are spinning and entangled? And where can I go to get these tests? I live in Zanesville Ohio


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  4. The title you have is “Our Brains Use Quantum Computation”. But the fact is that the referenced article simply states that according to their analysis, that they say is a classical analysis, the result is impossible. However, all known facts about quantum physics also says that the result is impossible by quantum means. To choose quantum as the explanation isn’t science, it’s wishful thinking.

  5. I’ve suspected as much for several years, it makes more sense than attributing all the brain’s recall and storage ability to electrochemical signals.

    The involvement of quantum biology with enzymes means it is likely used in other ways.

  6. It’s becoming clear that with all the brain and consciousness theories out there, the proof will be in the pudding. By this I mean, can any particular theory be used to create a human adult level conscious machine. My bet is on the late Gerald Edelman’s Extended Theory of Neuronal Group Selection. The lead group in robotics based on this theory is the Neurorobotics Lab at UC at Irvine. Dr. Edelman distinguished between primary consciousness, which came first in evolution, and that humans share with other conscious animals, and higher order consciousness, which came to only humans with the acquisition of language. A machine with primary consciousness will probably have to come first.

    What I find special about the TNGS is the Darwin series of automata created at the Neurosciences Institute by Dr. Edelman and his colleagues in the 1990’s and 2000’s. These machines perform in the real world, not in a restricted simulated world, and display convincing physical behavior indicative of higher psychological functions necessary for consciousness, such as perceptual categorization, memory, and learning. They are based on realistic models of the parts of the biological brain that the theory claims subserve these functions. The extended TNGS allows for the emergence of consciousness based only on further evolutionary development of the brain areas responsible for these functions, in a parsimonious way. No other research I’ve encountered is anywhere near as convincing.

    I post because on almost every video and article about the brain and consciousness that I encounter, the attitude seems to be that we still know next to nothing about how the brain and consciousness work; that there’s lots of data but no unifying theory. I believe the extended TNGS is that theory. My motivation is to keep that theory in front of the public. And obviously, I consider it the route to a truly conscious machine, primary and higher-order.

    My advice to people who want to create a conscious machine is to seriously ground themselves in the extended TNGS and the Darwin automata first, and proceed from there, by applying to Jeff Krichmar’s lab at UC Irvine, possibly. Dr. Edelman’s roadmap to a conscious machine is at https://arxiv.org/abs/2105.10461

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