Head to head
Orch OR vs Tegmark’s State of Matter
Penrose-Hameroff’s Orchestrated Objective Reduction and Tegmark’s State of Matter, compared field by field from their entries in the Atlas.
At a glance
- Orch OR belongs to the Quantum & Dimensions family in Kuhn's Landscape of Consciousness, Tegmark’s State of Matter to Neutral Monism.
- Both treat consciousness as emergent.
- On AI consciousness, Orch OR says “No” and Tegmark’s State of Matter says “Yes”.
- On life after death, Orch OR says “Possible” and Tegmark’s State of Matter says “No”.
- On mind uploading, Orch OR says “Conditional” and Tegmark’s State of Matter says “Likely”.
- On meaning and purpose, Orch OR says “Cosmic/Ultimate” and Tegmark’s State of Matter says “Humanistic only”.
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Quantum & Dimensions
Penrose-Hameroff’s Orchestrated Objective Reduction
Roger Penrose, Stuart Hameroff
The claim
In brief
Orch ORThis theory posits that consciousness arises from non-computational, gravitation-mediated objective reduction (OR) of quantum superpositions occurring within the protein structures (microtubules) inside brain neurons. This process, termed Orchestrated Objective Reduction (Orch OR), bridges the gap between quantum mechanics and classical reality to produce phenomenal experience.
Tegmark’s State of MatterTegmark proposes that consciousness can be understood as a specific state of matter, coined 'perceptronium,' which is defined by distinctive information-processing abilities. Starting from the premise that all existence is physical, the theory seeks principles that distinguish conscious, complex information processing from non-conscious processing.
What consciousness is
Orch ORConsciousness is identified as a non-computational physical process—the specific orchestration of gravitation-mediated objective reduction of quantum states linked to the fine-scale structure of spacetime geometry. Proto-conscious moments are fundamental and ubiquitous in the universe.
Tegmark’s State of MatterConsciousness is identified as the subjective experience or 'feeling' that arises when information is being processed in certain complex ways, constituting the state of matter termed 'perceptronium'.
Big questions
Can AI be conscious?Differ
Orch ORNoConsciousness is fundamentally non-computational and relies on specific biological quantum processes (Orch OR in microtubules); digital simulation cannot replicate true sentience.
Tegmark’s State of MatterYesThe theory is strictly physicalist ('It's all physics') and defines consciousness as a state of matter achievable through complex information processing. Therefore, artificial systems can achieve this state in principle.
Orch ORPossibleAs a non-local quantum process in spacetime geometry, consciousness provides a potentially plausible mechanism for phenomena like near-death experiences, the afterlife, and reincarnation.
Tegmark’s State of MatterNoConsciousness is an emergent state of matter (perceptronium) of the physical brain. The irreversible death and dissolution of the physical substrate would entail the cessation of consciousness.
Orch ORConditionalMind uploading requires recreating consciousness in an artificial medium (e.g., carbon nanotubes) that possesses the necessary quantum physical properties to sustain and orchestrate objective reduction events.
Tegmark’s State of MatterLikelyIf consciousness is a specific informational state of matter defined by mathematical/physical principles, that state could potentially be perfectly duplicated or uploaded into a non-biological medium by advanced technology.
Orch ORCosmic/UltimateProto-conscious moments are fundamental and ubiquitous, linking consciousness to the fine-scale structure of reality, suggesting inherent cosmic relevance and possibly enabling evolution itself.
Tegmark’s State of MatterHumanistic onlyThe foundation in physics and mathematical structure typically suggests no ultimate cosmic purpose, consistent with deflationary physicalist views. The theory does not explicitly propose cosmic teleology.
Nature of mind
Ontology
Orch ORQuantum Theory (Non-computational Physicalism / Proto-panpsychism)
Tegmark’s State of MatterPhysicalism / Monism
Mind and body
Orch ORConsciousness is non-computational physics. The brain's microtubules act as a mechanism to orchestrate proto-conscious quantum activity into coherent, rich conscious experiences, requiring a physics beyond current understanding.
Tegmark’s State of MatterAn identity relationship is implied, where subjective experience (mind) is identified as a specific physical state (a state of matter/information processing).
Fundamental or emergent
Orch OREmergent/Primitive (Hybrid)
Tegmark’s State of MatterEmergent
Qualia
Orch ORRich conscious experience (qualia) arises when orchestrated objective reduction occurs in neuronal microtubules, connecting the quantum information processing to the fundamental structure of spacetime geometry.
Tegmark’s State of MatterQualia are implicitly the 'feeling' (subjective experience) associated with perceptronium's specific information processing configurations, formalized through four principles: information, integration, independence, and dynamics.
How it works
Mechanism
Orch OROrchestrated Objective Reduction (Orch OR), where non-computational, instantaneous quantum state collapse is leveraged by coherent quantum activity sustained within microtubule lattices.
Tegmark’s State of MatterThe definition of perceptronium via the application of four distinct principles (information, integration, independence, and dynamics) to information processing in physical systems.
Where it is
Orch ORLocalized within neuronal microtubules, particularly in the brain, but fundamentally drawing upon ubiquitous proto-conscious properties throughout the universe.
Tegmark’s State of MatterLocalized to physical systems (e.g., neural networks or arbitrary quantum systems) that achieve the specific information-processing criteria defining perceptronium.
What it does
Orch ORConsciousness provides real-time conscious causal action through non-computable objective reduction events, potentially linked to the fundamental mechanisms of free will and choice.
Tegmark’s State of MatterConsciousness is crucial for information assessment and is viewed as functionally important for critical needs like caring for comatose patients or communicating with advanced AI. Causation is strictly physical.
Evidence and criticism
Testability
Orch ORTheoretically testable; versions involving collapse dynamics can, in principle, be tested with quantum computers, though current tests are rudimentary.
Tegmark’s State of MatterEmpirically testable
Tests so far
Orch ORStudies showing that general anesthetics, psychedelics, and antidepressants interact with microtubules.,Experiments aimed at testing quantum coherence maintenance in biological systems (e.g., tubulin studies).,Testing theoretical versions by combining IIT and collapse dynamics.
Tegmark’s State of MatterThe generalization of Integrated Information Theory implies relevance to IIT's measurement function (quantifying degrees of consciousness). The theory is intended to address concrete problems like assessing comatose patients and advanced AI.
Criticisms
Orch ORThe main tension is the challenge of maintaining quantum coherence for biological timescales in the hot, wet environment of the brain (environmental decoherence). The theory also requires non-existent physics (quantum gravity).
Tegmark’s State of MatterAs a generalization of IIT, it inherits existing critiques, such as the difficulty in explaining subjective feeling purely through physical and informational principles.
Sources
Key sources
Orch OR
- Shadows of the Mind: A Search for the Missing Science of Consciousness, Roger Penrose (1996)
- Conscious., Microtub. ‘Orch OR’, Stuart Hameroff (2014)
- Consciousness & new physics, Roger Penrose (2023)
Tegmark’s State of Matter
- Consciousness is a state of matter (2015)
- Our Mathematical Universe: My Quest for the Ultimate Nature of Reality (2014)
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