Knowledge Tree
measurement
Facts (25)
Sources
Quantum Approaches to Consciousness plato.stanford.edu Nov 30, 2004 7 facts
claimDiscussions of state collapse or state reduction, such as those occurring during measurement, implicitly refer to superposition states because those are the states that are reduced.
referenceIn his 1955 monograph on the mathematical foundations of quantum mechanics, John von Neumann introduced the projection postulate as a mathematical tool to describe measurement as a discontinuous, non-causal, instantaneous, and irreversible transition of a quantum state to an eigenstate.
claimEugene Wigner proposed in 1967 that a nonlinear modification of the Schrödinger equation was necessary to describe measurement as a real dynamical process that generates irreversible facts, replacing von Neumann's projection postulate.
claimEntangled systems remain in a quantum superposition as long as no measurement has occurred, which is why entanglement is co-addressed when state reduction is discussed.
claimJohn von Neumann concluded in his 1955 work that the result of a measurement on an object system is independent of whether the boundary between the observed system and the observing system is placed between the object and the instrument/observer, or between the object/instrument and the observer.
claimThe act of measurement in quantum theory has been a subject of controversy for more than seven decades.
claimIn Werner Heisenberg's framework, the 'actual' refers to a measured event within the Copenhagen interpretation, while the 'potential' refers to a tendency existing before measurement, representing a reality independent of measurement.
Non-physicalist Theories of Consciousness cambridge.org Dec 20, 2023 5 facts
claimIn quantum mechanics, the wave function describes objects as existing in a superposed state between different possibilities, which appear to collapse into determinate states upon measurement.
claimQuantum mechanics asserts that superpositions collapse upon measurement, but the theory does not define what constitutes a measurement or why measurement leads to collapse.
claimPhysicists Eugene Wigner and John von Neumann suggested that measurement in quantum mechanics fundamentally consists of observation by a conscious being, though they did not develop this idea in detail.
claimThe collapse of the wave function is the process where the many possibilities described by a wave function are reduced to a single definite state upon measurement.
claimBell’s theorem of no local hidden variables implies that it is impossible to predict with certainty the specific position or velocity a particle will collapse into upon measurement, regardless of the amount of local information gathered.
Quantum Approaches to Consciousness plato.stanford.edu Nov 30, 2004 4 facts
claimSome metaphorical quantum consciousness theories postulate that conscious acts are analogous to physical acts of measurement, or that correlations in psychological systems are analogous to physical entanglement.
claimEntanglement is always co-addressed when state reduction is discussed because entangled systems remain in a quantum superposition until a measurement occurs.
claimHeisenberg’s notion of the actual relates to a measured event, while his notion of the potential relates to a tendency existing before measurement, expressing a reality independent of measurement.
claimBusemeyer and Wang (2017) demonstrated that measuring incompatible observables sequentially induces uncertainties on the outcome of the second measurement.
Quantum Mechanics And Consciousness: The Physics Of Mind quantumzeitgeist.com Apr 17, 2025 4 facts
claimThe hypothesis that consciousness influences the behavior of particles at the quantum level is rooted in the concept of wave function collapse, where a particle's position becomes defined upon measurement.
claimThe observer effect in quantum mechanics, where the act of measurement alters particle states, has led some researchers to speculate that consciousness might influence reality at a quantum level.
claimThe Copenhagen interpretation of quantum mechanics suggests that wave function collapse occurs due to measurement, potentially involving consciousness.
claimThe Copenhagen interpretation of quantum mechanics posits that the act of measurement collapses a particle’s wave function into a definite state, which introduces the observer effect.
Consciousness-Induced Quantum State Reduction - Nova Spivack novaspivack.com Jun 2, 2025 1 fact
referenceJohn A. Wheeler and Wojciech H. Zurek edited the 1983 book 'Quantum Theory and Measurement', published by Princeton University Press, which compiles key texts on quantum theory and measurement.
Quantum Models of Consciousness from a Quantum Information ... arxiv.org Dec 20, 2024 1 fact
referenceA. M. Zheltikov authored the paper 'The critique of quantum mind: measurement, consciousness, delayed choice, and lost coherence,' published in Physics-Uspekhi, volume 61, in 2018.
Quantum Approaches to Consciousness plato.stanford.edu Nov 30, 2004 1 fact
claimWigner proposed a nonlinear modification to quantum theory to describe measurement as a real dynamical process generating irreversible facts, intending to replace von Neumann’s projection.
(PDF) Quantum Mechanics and Consciousness - Academia.edu academia.edu 1 fact
claimThe paper 'Quantum Mechanics and Consciousness' suggests that the probabilistic nature of quantum mechanics and its dependence on measurement imply a necessary role for consciousness, a view supported by Eugene Wigner in the 1980s.
Knowledge graphs - Amazon Science amazon.science 1 fact
claimThe PRIMAS (Prime & Marketing Analytics and Science) team at Amazon is seeking an Applied Scientist to manage measurement and experimentation for the Lifecycle Marketing Experimentation roadmap.