Knowledge Tree
Umezawa
Facts (15)
Sources
Quantum Approaches to Consciousness plato.stanford.edu Nov 30, 2004 8 facts
referenceRicciardi and Umezawa proposed in the 1960s that mental states, specifically memory states, can be treated in terms of vacuum states of quantum fields, an approach currently supported by Giuseppe Vitiello.
referenceFamiliar models of neuronal assemblies, such as those reviewed by Anderson and Rosenfeld (1988), are mostly formulated without invoking well-defined elements of quantum theory, with the exception of the approach by Umezawa, Vitiello, and others.
referenceIn the proposal by Umezawa, dynamically ordered states represent coherent activity in neuronal assemblies, where the activation of a neuronal assembly is necessary to make encoded content consciously accessible.
claimUmezawa's proposal models the brain as a many-particle system where neurons function as the particles.
referenceThe article 'Quantum Approaches to Consciousness' surveys several quantum-based theories of consciousness, including those proposed by Henry Stapp, Umezawa and Vitiello, Beck and Eccles, Penrose and Hameroff, dual-aspect approaches (Pauli, Jung, Bohm, Hiley), and models characterizing mental features using quantum formal structures (Aerts and colleagues).
referenceRicciardi and Umezawa (1967) proposed using the formalism of quantum field theory to describe brain states, specifically focusing on memory as inequivalent representations of vacuum states in many-particle systems.
referenceThe quantum field theory approach to brain states, originally proposed by Ricciardi and Umezawa, has been refined by researchers including Stuart et al. (1978, 1979) and Jibu and Yasue (1995), with recent progress incorporating effects of dissipation, chaos, and quantum noise by Vitiello (1995) and Pessa and Vitiello (2003).
referenceAccording to Umezawa, coherent neuronal assemblies correlated to memory states are regarded as vacuum states, and their activation leads to excited states with a finite lifetime, enabling conscious recollection of the content encoded in the vacuum state.
Quantum Approaches to Consciousness plato.stanford.edu Nov 30, 2004 4 facts
claimThe approach to modeling neuronal assemblies developed by Umezawa, Vitiello, and others is an exception to standard models because it incorporates quantum theory.
referenceRicciardi and Umezawa proposed a quantum mechanical approach to brain function in their 1967 paper 'Brain and physics of many-body problems', published in Kybernetik.
claimUmezawa proposed that dynamically ordered states in quantum field theory represent coherent activity in neuronal assemblies, which is necessary to make encoded content consciously accessible.
claimUmezawa’s proposal treats the brain as a many-particle system where the particles are neurons, operating at the level of neuronal assemblies that correlate directly with mental activity.
Quantum Theory of Consciousness - Scirp.org. scirp.org 2 facts
claimThe extension of the Ricciardi and Umezawa quantum brain model to dissipative dynamics has been investigated in relation to modeling neural networks that exhibit collective dynamics and long-range correlations among network units.
claimRicciardi and Umezawa proposed a quantum brain model in 1967 based on the quantum field theory (QFT) of many-body systems to describe the nonlocality of brain functions, specifically memory storing and recalling.
(PDF) Quantum Mechanics and Consciousness - Academia.edu academia.edu 1 fact
claimQuantum nonlocality suggests the existence of holistic connections between consciousness and memory, with researchers like Umezawa and collaborators correlating mental states with quantum collective behavior.