Observational Perturbation Theory (OPT) is proposed as an alternative meta-theoretical framework to the Copenhagen interpretation of quantum mechanics. It posits that observation is not a passive reading of an objective reality but a process in which the observer injects action into the physical system via messengers (e.g., photons), causing the system's state vector to become irreversibly locked onto the observer's basis. The outcome is determined jointly by the underlying unitary evolution and the observational coupling parameters. OPT embeds the observer inside the physical system as part of the coupled variables, thereby eliminating non-physical assumptions such as wave-function collapse or consciousness-induced reality. The complete axiomatic system (Axiom 0 to Axiom 7) is presented, and it is demonstrated that within OPT, quantum probabilities are reinterpreted as epistemic uncertainties due to incomplete knowledge of the coupling parameters, rather than fundamental randomness. This framework offers a coherent, observer-inclusive description from microscopic interference to macroscopic determinism. Keywords: Quantum measurement problem, observer effect, axiomatic quantum mechanics, decoherence, physical reality, foundations of physics.
Observational Perturbation Theory (OPT) is proposed as an alternative meta-theoretical framework to the Copenhagen interpretation of quantum mechanics. It posits that observation is not a passive reading of an objective reality but a process in which the observer injects action into the physical system via messengers (e.g., photons), causing the system's state vector to become irreversibly locked onto the observer's basis. The outcome is determined jointly by the underlying unitary evolution and the observational coupling parameters. OPT embeds the observer inside the physical system as part of the coupled variables, thereby eliminating non-physical assumptions such as wave-function collapse or consciousness-induced reality. The complete axiomatic system (Axiom 0 to Axiom 7) is presented, and it is demonstrated that within OPT, quantum probabilities are reinterpreted as epistemic uncertainties due to incomplete knowledge of the coupling parameters, rather than fundamental randomness. This framework offers a coherent, observer-inclusive description from microscopic interference to macroscopic determinism. Keywords: Quantum measurement problem, observer effect, axiomatic quantum mechanics, decoherence, physical reality, foundations of physics.
The prevailing interpretation of quantum mechanics, often referred to as the Copenhagen interpretation, posits a fundamental disturbance caused by measurement, collapsing the wave function and defining a definite state. This theory, termed the Molecular Reality Reconstruction Theory (MRRT), offers an alternative perspective. It argues that the observed measurement outcome represents a reconstructed reality, rather than a direct reflection of the initial, underlying molecular state. The theory proposes a framework for identifying the true, pre-measurement molecular state, drawing parallels with the quantum measurement problem. We explore the concept of a "hidden variable" associated with each molecule, suggesting that the measured outcome is a projection of this hidden variable onto a specific observable, rather than a fundamental alteration of the molecule itself. This reconstruction process is inherently probabilistic, governed by the underlying quantum mechanical framework. The central tenet of MRRT is that the observed molecular state is a consequence of this reconstruction process, and not a direct manifestation of the molecule's intrinsic properties before measurement. This framework seeks to resolve the inherent paradoxes associated with the collapse of the wave function and provides a new lens through which to understand the relationship between measurement and reality. The theory's foundation rests on the idea that the act of measurement interacts with the molecule to produce the observed result, rather than the molecule directly determining the outcome. Mathematical formalism is presented to illustrate the core concepts and relationships within this theory.
The persistent quantum measurement problem stems from the "selection paradigm" inherent in the standard (Copenhagen) interpretation, which posits an active "collapse" of the wave function upon measurement. This study reframes the problem using the Eliminative Methodology as previously formalized by the author [1]. This methodology shifts the explanatory framework from "selection" to "elimination." We argue that the measurement device does not act as a selector but creates a physically restrictive context—governed by epistemic, ontological, and methodological constraints—in which quantum superpositions cannot be sustained. The observed definite outcome is interpreted not as a randomly chosen state but as the Passive Singularity: the single structure that remains non-eliminated after all contextually incompatible possibilities are filtered out. This approach naturally integrates with decoherence theory, avoids metaphysical pitfalls of other interpretations, and offers a parsimonious resolution to the problem by focusing on what is excluded by physical context rather than on what is mysteriously chosen. Keywords: Quantum measurement problem, eliminative methodology, decoherence, contextual reality, passive singularity, quantum foundations.
Abstract Unlike classical mechanics, the Copenhagen interpretation of quantum mechanics does not provide an objective space-time picture of the actual history of a physical system. This paper suggests how the conceptual foundations of quantum mechanics can be reformulated, without changing the mathematical content of the theory or its detailed agreement with experiment and without introducing any hidden variables, in order to provide an objective, covariant, Lagrangian description of reality which is deterministic and time-symmetric on the microscopic scale. The basis of this description can be expressed either as an action functional or as a summation over Feynman diagrams or paths. The probability laws associated with the quantum-mechanical measurement process, and the asymmetry in time of the principles of macroscopic causality and of the laws of statistical mechanics, are interpreted as consequences of the particular boundary conditions that apply to the actual universe. The objective interpretation does not include the observer and the measurement process among the fundamental concepts of the theory, but it does entail a revision of our ideas of determinism and of time, since in a Lagrangian theory both initial and final boundary conditions on the action functional are required.
This paper resolves the measurement problem and the problem of intersubjectivity—two foundational puzzles of quantum mechanics—within the Planck Core Framework, without requiring any additional postulates beyond the three axioms of the framework. I prove that measurement is not a mysterious non-unitary "collapse" of the wavefunction, but a unitary process of entanglement establishment between subsystems of the quantum bit network. The apparent collapse arises from the observer's limited access to the full entanglement structure: what we perceive as a definite measurement outcome is simply our location within a specific entanglement branch. The Born rule is derived, not postulated—the probability of an outcome is proportional to the number of entanglement threads in the corresponding branch. The Wigner's friend paradox is resolved by proving that different observers may occupy different branches, but their descriptions converge when they exchange information via entanglement. I further introduce the concept of the "information eye"—a hypothetical direct entanglement sensor—and prove that any macroscopic biological organism operating at biological temperatures will inevitably perceive a decohered, classicalised representation of reality, not the underlying quantum information network itself. The classical appearance of the macroscopic world is thus derived as a contingent consequence of thermodynamic constraints on biological evolution, not a fundamental feature of reality. This work completes the derivation of quantum mechanics from the Planck Core Framework, establishing that no special measurement postulate is required.
The central part of Everett's formulation of quantum mechanics is a quantum mechanical model of memory and of observation as the recording of information in a memory. To use this model as an answer to the measurement problem, Everett has to assume that a conscious observer can be in a superposition of such memory states and be unaware of it. This assumption has puzzled generations of readers. The fundamental aim of this dissertation is to find a set of simpler assumptions which are sufficient to show that Everett's model is empirically adequate. I argue that Everett's model needs three assumptions to account for the process of observation: an assumption of decoherence of observers as quantum mechanical systems; an assumption of supervenience of mental states (qualities) over quantum mechanical properties; and an assumption about the interpretation of quantum mechanical states in general: quantum mechanical states describe ensembles of states of affairs coexisting in the same system. I argue that the only plausible understanding of such ensembles is as ensembles of possibilities, and that all standard no-collapse interpretations agree in this reading of quantum mechanical states. Their differences can be understood as different theories about what marks the real state within this ensemble, and Everett's theory as the claim that no additional 'mark of reality' is necessary. Using the three assumptions, I argue that introspection cannot determine the objective quantum mechanical state of an observer. Rather, the introspective qualities of a quantum mechanical state can be represented by a (classical) statistical ensemble of subjective states. An analysis of these subjective states and their dynamics leads to the conclusion that they suffice to give empirically correct predictions. The argument for the empirical adequacy of the subjective state entails that knowledge of the objective quantum mechanical state is impossible in principle. Empirical reality for a conscious observer is not described by the objective state, but by a Everettian relative state conditional on the subjective state, and no theoretical 'mark of reality' is necessary for this concept of reality. I compare the resulting concept of reality to Kant's distinction between empirical and transcendental reality.
Quantum mechanics famously posits two distinct evolution rules for the state of a system: a deterministic, unitary time evolution under the Schr¨odinger equation, and a probabilistic “collapse” of the wavefunction upon measurement as dictated by the Born rule. The apparent inconsistency of these two dynamical laws – one continuous and one discontinuous – constitutes the quantum measurement problem. This foundational problem, which underlies the emergence of definite outcomes from quantum superpositions, has persisted since the theory’s inception. In this review, we present a comprehensive and rigorous examination of the measurement problem and survey the leading approaches that seek to resolve or circumvent it. We begin by formulating the measurement problem and its conceptual challenges. We then discuss in detail the major interpretations of quantum mechanics and theoretical frameworks addressing the problem: the Copenhagen interpretation, Everett’s many-worlds interpretation, de Broglie–Bohm pilot-wave theory, objective collapse models, the role of decoherence and environment-induced superselection, and epistemic approaches such as QBism. For each interpretation, we describe the core principles and mathematical formalism, assessing how (and whether) it attempts to solve the measurement problem. We also review modern developments and experiments relevant to quantum measurements, including tests of Bell inequalities, observations of decoherence and macroscopic superpositions, weak measurements and quantum eraser experiments, and thought experiments ‘a la Wigner’s friend. We highlight how these results inform the ongoing debate. Finally, we discuss open problems and challenges that remain in fully resolving the measurement problem.