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Title Phase transitions of Integrated Information in the Generalized Ising Model of the Brain
URL
Publication Date
University/Publisher University of Western Ontario
Abstract The bold framework of the Integrated Information Theory of consciousness are explored in this thesis in the context of the generalized Ising model of the brain. Small 5-node networks are simulated on the Ising model with Metropolis transitions where the fitting parameter T is fit to empirical functional connectivity matrices of healthy human subjects. Fitting to criticality, results indicate that integrated information undergoes a phase transition at the critical temperature Tc. The results are interpreted in the context of an emerging perspective of the science of complexity and perhaps even the philosophy of science; the universe as a self-organizing critical system undergoing cascades of phase transitions into complexity.
Subjects/Keywords integrated information; consciousness; ising model; criticality; phase transitionsThe bold framework of the Integrated Information Theory of consciousness are explored in this thesis in the context of the generalized Ising model of the brain. Small 5-node networks are simulated on the Ising model with Metropolis transitions where the fitting parameter $T$ is fit to empirical functional connectivity matrices of healthy human subjects. Fitting to criticality; results indicate that integrated information undergoes a phase transition at the critical temperature $T_c$. The results are interpreted in the context of an emerging perspective of the science of complexity and perhaps even the philosophy of science; the universe as a self-organizing critical system undergoing cascades of phase transitions into complexity.; complexity
Language en
Country of Publication ca
Format application/pdf
Record ID oai:ir.lib.uwo.ca:etd-7178
Repository uwo
Date Retrieved
Date Indexed 2020-06-19

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perspective of the critical brain to explore the interaction of these ideas. Our results indicate that consciousness, an abstract macroscopic object or order parameter, seems to undergo a phase transition at the critical temperature of the Ising model. At the

…onset of this phase transition, the integrated information (consciousness) generated by the system is maximally susceptible. We interpret our results in light of recent arguments that complexity, life, and consciousness all tend to be critical

integrated information’ quantifies consciousness in a system and an object called the ‘conceptual structure’ of the system describes the quality of the conscious experience. In this thesis the bold ideas of IIT are combined with the emerging physical…

are calculated. The TPMs are then fed into the φ algorithm to compute the expected integrated information generated by this system as a function of temperature. be constraint to a state in order to calculate the cause repertoire. We can choose one at

…macroscopic properties. A phase transition as a general phenomenon is the observation that many systems seem to have abrupt or discontinuous changes in their defining characteristics. Perhaps not so coincidentally, from gaining a better understanding of the

a number of other supporting ideas, the notion that a self-organizing critical brain is an evolutionarily attractor for reasons that seems to penetrate into the heart of meta-cognition, physics, and the philosophy of science as a whole. 1.1 What is…

…difference to the trajectory of the object’s phase space in an informative way from the intrinsic perspective of the object. A photo diode can ‘feel’ light, an electron can ‘feel’ a proton, but are these objects conscious? So far we defined objects, what ‘can…

…temperatures are illustrated in Figure 1.4. The process of calculating integrated information is then equivalent to attempting to find factors for the matrix M in the form of MA ⊗ MB . For systems that are composed of independent components, there will be a

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