Integrated information theory (IIT) 4.0: Formulating the properties of phenomenal existence in physical terms

Alireza Zaeemzadeh; Andrew M Haun; Bj{\o}rn E Juel; Giulio Tononi; Graham Findlay; Isaac David; Jeremiah Hendren; Jonathan P Lang; Keiko Fujii; Larissa Albantakis

Integrated information theory (IIT) 4.0: Formulating the properties of phenomenal existence in physical terms

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arxiv 2212.14787 v1 pith:ZBYWL326 submitted 2022-12-30 q-bio.NC

Integrated information theory (IIT) 4.0: Formulating the properties of phenomenal existence in physical terms

Larissa Albantakis , Leonardo Barbosa , Graham Findlay , Matteo Grasso , Andrew M Haun , William Marshall , William GP Mayner , Alireza Zaeemzadeh

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Melanie Boly Bj{\o}rn E Juel Shuntaro Sasai Keiko Fujii Isaac David Jeremiah Hendren Jonathan P Lang Giulio Tononi

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This paper presents Integrated Information Theory (IIT) 4.0. IIT aims to account for the properties of experience in physical (operational) terms. It identifies the essential properties of experience (axioms), infers the necessary and sufficient properties that its substrate must satisfy (postulates), and expresses them in mathematical terms. In principle, the postulates can be applied to any system of units in a state to determine whether it is conscious, to what degree, and in what way. IIT offers a parsimonious explanation of empirical evidence, makes testable predictions, and permits inferences and extrapolations. IIT 4.0 incorporates several developments of the past ten years, including a more accurate translation of axioms into postulates and mathematical expressions, the introduction of a unique measure of intrinsic information that is consistent with the postulates, and an explicit assessment of causal relations. By fully unfolding a system's irreducible cause-effect power, the distinctions and relations specified by a substrate can account for the quality of experience.

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Quantum Superpositions of Conscious States in a Minimal Integrated Information Model
quant-ph 2023-09 unverdicted novelty 7.0

A minimal IIT-based quantum circuit shows that Lindblad collapse dynamics require proliferation of operators to tie rates solely to differences in conscious states.