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1 Causality, Measurement, and Elementary Interactions

Edward J. Gillis

Published Jan 1, 2011• 6 citations
OpenAlex

Abstract

Signal causality, the prohibition of superluminal information transmission, is the fundamental property shared by quantum measurement theory and relativity, and it is the key to understanding the connection between nonlocal measurement effects and elementary interactions. To prevent those effects from transmitting information between the generating and observing process, they must be induced by the kinds of entangling interactions that constitute measurements, as implied in the Projection Postulate. They must also be nondeterministic as reflected in the Born Probability Rule. The nondeterminism of entanglement-generating processes explains why the relevant types of information cannot be instantiated in elementary systems, and why the sequencing of nonlocal effects is, in principle, unobservable. This perspective suggests a simple hypothesis about nonlocal transfers of amplitude during entangling interactions, which yields straightforward experimental consequences.

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Experimental Tests of the Projection Postulate

Edward J. Gillis

Bell [Helv. Phys.Act. 48 1975] described an idealized test of the projection postulate in order to illustrate the ambiguities in the experimental predictions of quantum theory. An approach to the implementation of such tests is outlined here, based on the interesting logical relationship between the projection postulate and the no-superluminal-signaling principle. Gisin's theorem [Helv. Phys. Act. 62 1989] shows that the no-signaling principle implies that any description of projection at the elementary level must be nondeterministic. The lack of determinism means that information cannot be instantiated in a reproducible and transmittable form in isolated microsystems. The implied limitation on information allows one to interpret the no-signaling principle in purely physical terms as a prohibition of superluminal information transmission. This prohibition, in turn, imposes tight constraints on the connection between projection and elementary processes, leading to a specific hypothesis about how projection effects originate. The hypothesis serves as the basis for the experimental proposal.

•Jan 13, 2015•0 citations

Wave Function Collapse and the No-Superluminal-Signaling Principle

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The assumption that wave function collapse is a real occurrence has very interesting consequences - both experimental and theoretical. Besides predicting observable deviations from linear evolution, it implies that these deviations must originate in nondeterministic effects at the elementary level in order to prevent superluminal signaling, as demonstrated by Gisin. This lack of determinism implies that information cannot be instantiated in a reproducible form in isolated microsystems (as illustrated by the No-cloning theorem). By stipulating that information is a reproducible and referential property of physical systems, one can formulate the no-signaling principle in strictly physical terms as a prohibition of the acquisition of information about spacelike-separated occurrences. This formulation provides a new perspective on the relationship between relativity and spacetime structure, and it imposes tight constraints on the way in which collapse effects are induced. These constraints indicate that wave function collapse results from (presumably small) nondeterministic deviations from linear evolution associated with nonlocally entangling interactions. This hypothesis can be formalized in a stochastic collapse equation and used to assess the feasibility of testing for collapse effects.

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This work presents a conceptual and semi-formal analysis of quantum entanglement, locality, and determinism, motivated by a thought experiment involving double-slit measurements performed on entangled particles at spacelike separation. While quantum correlations appear instantaneous, the paper demonstrates that no superluminal information transfer or causal influence is required to explain observed outcomes.Building upon the Einstein–Podolsky–Rosen framework and Bell’s theorem, the study distinguishes between local dynamical processes and nonlocal informational correlations encoded in the global quantum state. It argues that measurement outcomes are locally realized yet globally constrained, leading to an effectively deterministic universal description while preserving epistemic uncertainty for observers.The paper reframes quantum nonlocality as a manifestation of global consistency rather than physical influence, offering insights into the relationship between realism, free will, and relativistic causality. The discussion is interpretational in nature and does not introduce new experimental claims, aiming instead to clarify foundational assumptions underlying quantum theory.This work is intended for researchers and students interested in quantum foundations, the philosophy of physics, and the conceptual structure of modern physical theories.

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Quantum Mechanics: Ontology and Information

Gennaro Auletta

Quantum theory shows that natural laws cannot be understood as ruling single events since the latter occur randomly. Nevertheless, the physical world shows everywhere order whose source cannot be represented by the latter. It is shown that this order is due to the presence of quantum correlations. Since their e↵ect is to reduce the space of the possible events, they can be considered as causal factors. However, being correlations, they do not display the dynamic character that would be required in order to produce a determinate e↵ect. This is why they need additional local factors in order to concur to the production of a certain event. If not so, this would even imply a violation of Einstein’s locality since correlations could be used by themselves to transmit superluminal signals. Due to such a character of correlation, they can be understood as kind of potential reality needing actual (and local) context to be e↵ective. This allows also a distinction that is classically unknown between locality and globality. Such a distinction solves the important problem of measurement showing that ultimately we have irreversible local processes while globally everything is still reversible. In particular, it is a shift of information that can explain this local phenomenon. In fact, quantum systems are essentially information and also the measurement process is ultimately a dealing with information: information processing (preparing a system), information sharing (coupling a system with an apparatus) and information selection (detecting). State, observable and property appear as equivalence classes of these three procedures, respectively. Finally, the distinction between interpreted and uninterpreted ontology is considered in a Kantian perspective, but it is also shown that the approach supported here is rather a critical realism.

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It is shown that quantum mechanics is, like thermodynamics, a phenomenological theory i.e., not a causal theory, ( not because it is a statistical theory - statistical theories with caused probability distributions can be regarded as causal) but because pure states, i.e., probability distributions of measurement values, cannot inhere in elementary particles and therefore cannot change when their world tubes intersect and hence they cannot be regarded as interacting causally. By a causal theory is meant a theory that specifies the changes in time of the states of causally interacting entities in its domain. The areas in quantum mechanics in which causal interactions are relevant include, though not explicitly, measurement and therefore the Born rule, and, explicitly, the unitary Schrodinger time development of states. The Born rule probabilities are shown to to refer not to conjoint superpositions of eigenstates but to classical mixtures of mutually exclusive eigenvalues and the Schrodinger time development of states is shown to refer to the time development of the states of non-causally interacting elementary particles and hence cannot be regarded as as a causal time development equation, appearances to the contrary notwithstanding. The recognition that quantum mechanics is not a causal theory but a phenomenological theory like thermodynamics does not affect the way it is employed to calculate an predict and hence preserves its empirical success but it does allow a typically simple phenomenological theory explanation of entanglement and other apparently non-local phenomena.

arXiv:2305.01525•Apr 28, 2023•0 citations

Superluminal Communication Theory (SCT)

Lei Ding

The nonlocal correlations of quantum entanglement, famously described by Einstein as “spooky action at a distance”, have stood as one of the most profound and puzzling features of quantum mechanics since the 1935 EPR paper. Decades of increasingly sophisticated experiments, culminating in loophole-free Bell tests, have irrefutably confirmed that these correlations cannot be explained by any local hidden variable theory. Yet, standard quantum mechanics offers no deeper explanation for this nonlocality—it is simply accepted as a fundamental, irreducible feature of reality. The no-signaling theorem further asserts that this nonlocality cannot be harnessed for superluminal communication, as single measurement outcomes are fundamentally random. This paper challenges this conventional wisdom. It asks a question that strikes at the heart of physical reality: Is quantum entanglement truly fundamental, or is it the manifestation of a deeper, hidden structure? If such a structure exists, it must leave observable imprints. The Instantaneous Teleportation Cosmos (ITC) framework, developed throughout these chapters, proposes precisely such a deep structure: entangled particles are not independent entities, but two ports of the same basal storage unit—a non-spatial, absolutely existing reality from which our four-dimensional spacetime emerges. The ITC framework is built upon four core properties, each derived from first principles, experimental evidence, and rigorous logic: P1 (Storage Perfection): Information in the basal structure is perfectly preserved, never decaying or distorting. This property, rooted in the principle of information conservation, ensures that modulations can be accumulated over time. P2 (Instantaneous Connectivity): Basal nodes are connected without distance or delay. This property, directly motivated by the violation of Bell inequalities, explains the nonlocality of entanglement and provides the basis for the possibility of superluminal communication. P3 (Mapping Determinacy): The projection from a basal state to the statistical distribution in emergent spacetime is deterministic and injective (one-to-one). Determinacy ensures experimental reproducibility, while injectivity guarantees the fundamental distinguishability of different physical states—both prerequisites for science itself. P4 (Manifestation Finiteness): The manifestation of basal information in emergent spacetime requires a local time τ and yields random single outcomes. This property acts as the crucial barrier safeguarding causality, preventing the instantaneous connectivity of P2 from being used for single-shot information transmission, and ensuring compatibility with relativity. These four properties work in synergy. P2 guarantees that a local modulation can affect a distant party. P1 ensures that this effect is accumulable over multiple trials. P3 dictates that a change in the basal state must lead to a change in the statistical distribution at the manifestation layer. P4 explains that while single outcomes remain random, this statistical change manifests as a tiny, detectable shift ΔP in the single-party probability. The central, testable prediction of the ITC framework is that this shift is non-zero: ΔP≠0. This directly contradicts the no-signaling theorem of standard quantum mechanics, which asserts ΔP = 0. Deriving this necessity from the four core properties is a central theme of this theory. The structure of the paper mirrors this logical progression. Chapter 1 re‑examines the no‑signaling theorem, arguing that the existence of the basal structure changes the meaning of local operations—the operation modifies the boundary conditions of the shared storage unit, while the reduced density matrix is merely a projection of the basal state. Hence the theorem holds for finite samples but can be transcended in the infinite‑sample limit. Chapter 2 chains the four properties to rigorously derive that modulation inevitably causes a change ΔP≠0 in the receiver’s single‑party probability. Chapter 3 explores how the bipartite correlation information, lost in the partial trace of standard quantum mechanics, can leave an imprint as ΔP in single‑party statistics under the ITC framework. Theoretical predictions demand experimental tests. Chapter 4 designs an immediately realizable decisive experiment based on demonstrated 10-km trapped-ion entanglement capabilities. By accumulating 245,000 total events (122,500 inside the modulation window) over approximately 30 hours and using a 7σ confidence standard, the experiment will detect ΔP and measure the response delay. If ΔP is significantly non-zero and the delay is much smaller than the light travel time, it would provide the first evidence for a deep structure; if no signal is seen, the one-sided 95% confidence upper bound on ΔP will be constrained below 0.17%, providing the most stringent test of the no-signaling theorem to date. Chapter 5 synergizes the P5 property of SET theory with the π-pulse. By altering the content of the information cluster at the sender (Alice), the π-pulse generates the original probability shift ΔP₀, serving as the source of the signal. Meanwhile, P5 resonance at the receiver (Bob) excites the τ-mode, compressing the manifestation time τ. This reduces quantum fluctuation noise, increases the signal‑to‑noise ratio, and thereby enhances the detectability of ΔP—this process that does not change the signal itself but amplifies its distinguishability within the noise. Working in synergy, these two mechanisms bring ΔP to an experimentally detectable level, ensuring that even a weak initial signal can be reliably captured. This paper presents a coherent, self-contained theory that, starting from the first principles and core properties of ITC theory, predicts observable effects and designs a clear experimental path for verification. Whether the outcome confirms the existence of a deep structure or imposes a more rigorous constraint on the no-signaling theorem, the work herein represents a significant step in our relentless pursuit to understand the ultimate nature of reality.

•Feb 20, 2026•0 citations
Signal causality, the prohibition of superluminal information transmission, is the fundamental property shared by quantum measurement theory and relativity, and it is the key to understanding the connection between nonlocal measurement effects and elementary interactions. To prevent those effects from transmitting information between the generating and observing process, they must be induced by the kinds of entangling interactions that constitute measurements, as implied in the Projection Postulate. They must also be nondeterministic as reflected in the Born Probability Rule. The nondeterminism of entanglement-generating processes explains why the relevant types of information cannot be instantiated in elementary systems, and why the sequencing of nonlocal effects is, in principle, unobservable. This perspective suggests a simple hypothesis about nonlocal transfers of amplitude during entangling interactions, which yields straightforward experimental consequences.
Bell [Helv. Phys.Act. 48 1975] described an idealized test of the projection postulate in order to illustrate the ambiguities in the experimental predictions of quantum theory. An approach to the implementation of such tests is outlined here, based on the interesting logical relationship between the projection postulate and the no-superluminal-signaling principle. Gisin's theorem [Helv. Phys. Act. 62 1989] shows that the no-signaling principle implies that any description of projection at the elementary level must be nondeterministic. The lack of determinism means that information cannot be instantiated in a reproducible and transmittable form in isolated microsystems. The implied limitation on information allows one to interpret the no-signaling principle in purely physical terms as a prohibition of superluminal information transmission. This prohibition, in turn, imposes tight constraints on the connection between projection and elementary processes, leading to a specific hypothesis about how projection effects originate. The hypothesis serves as the basis for the experimental proposal.
The assumption that wave function collapse is a real occurrence has very interesting consequences - both experimental and theoretical. Besides predicting observable deviations from linear evolution, it implies that these deviations must originate in nondeterministic effects at the elementary level in order to prevent superluminal signaling, as demonstrated by Gisin. This lack of determinism implies that information cannot be instantiated in a reproducible form in isolated microsystems (as illustrated by the No-cloning theorem). By stipulating that information is a reproducible and referential property of physical systems, one can formulate the no-signaling principle in strictly physical terms as a prohibition of the acquisition of information about spacelike-separated occurrences. This formulation provides a new perspective on the relationship between relativity and spacetime structure, and it imposes tight constraints on the way in which collapse effects are induced. These constraints indicate that wave function collapse results from (presumably small) nondeterministic deviations from linear evolution associated with nonlocally entangling interactions. This hypothesis can be formalized in a stochastic collapse equation and used to assess the feasibility of testing for collapse effects.
This work presents a conceptual and semi-formal analysis of quantum entanglement, locality, and determinism, motivated by a thought experiment involving double-slit measurements performed on entangled particles at spacelike separation. While quantum correlations appear instantaneous, the paper demonstrates that no superluminal information transfer or causal influence is required to explain observed outcomes.Building upon the Einstein–Podolsky–Rosen framework and Bell’s theorem, the study distinguishes between local dynamical processes and nonlocal informational correlations encoded in the global quantum state. It argues that measurement outcomes are locally realized yet globally constrained, leading to an effectively deterministic universal description while preserving epistemic uncertainty for observers.The paper reframes quantum nonlocality as a manifestation of global consistency rather than physical influence, offering insights into the relationship between realism, free will, and relativistic causality. The discussion is interpretational in nature and does not introduce new experimental claims, aiming instead to clarify foundational assumptions underlying quantum theory.This work is intended for researchers and students interested in quantum foundations, the philosophy of physics, and the conceptual structure of modern physical theories.
Quantum theory shows that natural laws cannot be understood as ruling single events since the latter occur randomly. Nevertheless, the physical world shows everywhere order whose source cannot be represented by the latter. It is shown that this order is due to the presence of quantum correlations. Since their e↵ect is to reduce the space of the possible events, they can be considered as causal factors. However, being correlations, they do not display the dynamic character that would be required in order to produce a determinate e↵ect. This is why they need additional local factors in order to concur to the production of a certain event. If not so, this would even imply a violation of Einstein’s locality since correlations could be used by themselves to transmit superluminal signals. Due to such a character of correlation, they can be understood as kind of potential reality needing actual (and local) context to be e↵ective. This allows also a distinction that is classically unknown between locality and globality. Such a distinction solves the important problem of measurement showing that ultimately we have irreversible local processes while globally everything is still reversible. In particular, it is a shift of information that can explain this local phenomenon. In fact, quantum systems are essentially information and also the measurement process is ultimately a dealing with information: information processing (preparing a system), information sharing (coupling a system with an apparatus) and information selection (detecting). State, observable and property appear as equivalence classes of these three procedures, respectively. Finally, the distinction between interpreted and uninterpreted ontology is considered in a Kantian perspective, but it is also shown that the approach supported here is rather a critical realism.
It is shown that quantum mechanics is, like thermodynamics, a phenomenological theory i.e., not a causal theory, ( not because it is a statistical theory - statistical theories with caused probability distributions can be regarded as causal) but because pure states, i.e., probability distributions of measurement values, cannot inhere in elementary particles and therefore cannot change when their world tubes intersect and hence they cannot be regarded as interacting causally. By a causal theory is meant a theory that specifies the changes in time of the states of causally interacting entities in its domain. The areas in quantum mechanics in which causal interactions are relevant include, though not explicitly, measurement and therefore the Born rule, and, explicitly, the unitary Schrodinger time development of states. The Born rule probabilities are shown to to refer not to conjoint superpositions of eigenstates but to classical mixtures of mutually exclusive eigenvalues and the Schrodinger time development of states is shown to refer to the time development of the states of non-causally interacting elementary particles and hence cannot be regarded as as a causal time development equation, appearances to the contrary notwithstanding. The recognition that quantum mechanics is not a causal theory but a phenomenological theory like thermodynamics does not affect the way it is employed to calculate an predict and hence preserves its empirical success but it does allow a typically simple phenomenological theory explanation of entanglement and other apparently non-local phenomena.
The nonlocal correlations of quantum entanglement, famously described by Einstein as “spooky action at a distance”, have stood as one of the most profound and puzzling features of quantum mechanics since the 1935 EPR paper. Decades of increasingly sophisticated experiments, culminating in loophole-free Bell tests, have irrefutably confirmed that these correlations cannot be explained by any local hidden variable theory. Yet, standard quantum mechanics offers no deeper explanation for this nonlocality—it is simply accepted as a fundamental, irreducible feature of reality. The no-signaling theorem further asserts that this nonlocality cannot be harnessed for superluminal communication, as single measurement outcomes are fundamentally random. This paper challenges this conventional wisdom. It asks a question that strikes at the heart of physical reality: Is quantum entanglement truly fundamental, or is it the manifestation of a deeper, hidden structure? If such a structure exists, it must leave observable imprints. The Instantaneous Teleportation Cosmos (ITC) framework, developed throughout these chapters, proposes precisely such a deep structure: entangled particles are not independent entities, but two ports of the same basal storage unit—a non-spatial, absolutely existing reality from which our four-dimensional spacetime emerges. The ITC framework is built upon four core properties, each derived from first principles, experimental evidence, and rigorous logic: P1 (Storage Perfection): Information in the basal structure is perfectly preserved, never decaying or distorting. This property, rooted in the principle of information conservation, ensures that modulations can be accumulated over time. P2 (Instantaneous Connectivity): Basal nodes are connected without distance or delay. This property, directly motivated by the violation of Bell inequalities, explains the nonlocality of entanglement and provides the basis for the possibility of superluminal communication. P3 (Mapping Determinacy): The projection from a basal state to the statistical distribution in emergent spacetime is deterministic and injective (one-to-one). Determinacy ensures experimental reproducibility, while injectivity guarantees the fundamental distinguishability of different physical states—both prerequisites for science itself. P4 (Manifestation Finiteness): The manifestation of basal information in emergent spacetime requires a local time τ and yields random single outcomes. This property acts as the crucial barrier safeguarding causality, preventing the instantaneous connectivity of P2 from being used for single-shot information transmission, and ensuring compatibility with relativity. These four properties work in synergy. P2 guarantees that a local modulation can affect a distant party. P1 ensures that this effect is accumulable over multiple trials. P3 dictates that a change in the basal state must lead to a change in the statistical distribution at the manifestation layer. P4 explains that while single outcomes remain random, this statistical change manifests as a tiny, detectable shift ΔP in the single-party probability. The central, testable prediction of the ITC framework is that this shift is non-zero: ΔP≠0. This directly contradicts the no-signaling theorem of standard quantum mechanics, which asserts ΔP = 0. Deriving this necessity from the four core properties is a central theme of this theory. The structure of the paper mirrors this logical progression. Chapter 1 re‑examines the no‑signaling theorem, arguing that the existence of the basal structure changes the meaning of local operations—the operation modifies the boundary conditions of the shared storage unit, while the reduced density matrix is merely a projection of the basal state. Hence the theorem holds for finite samples but can be transcended in the infinite‑sample limit. Chapter 2 chains the four properties to rigorously derive that modulation inevitably causes a change ΔP≠0 in the receiver’s single‑party probability. Chapter 3 explores how the bipartite correlation information, lost in the partial trace of standard quantum mechanics, can leave an imprint as ΔP in single‑party statistics under the ITC framework. Theoretical predictions demand experimental tests. Chapter 4 designs an immediately realizable decisive experiment based on demonstrated 10-km trapped-ion entanglement capabilities. By accumulating 245,000 total events (122,500 inside the modulation window) over approximately 30 hours and using a 7σ confidence standard, the experiment will detect ΔP and measure the response delay. If ΔP is significantly non-zero and the delay is much smaller than the light travel time, it would provide the first evidence for a deep structure; if no signal is seen, the one-sided 95% confidence upper bound on ΔP will be constrained below 0.17%, providing the most stringent test of the no-signaling theorem to date. Chapter 5 synergizes the P5 property of SET theory with the π-pulse. By altering the content of the information cluster at the sender (Alice), the π-pulse generates the original probability shift ΔP₀, serving as the source of the signal. Meanwhile, P5 resonance at the receiver (Bob) excites the τ-mode, compressing the manifestation time τ. This reduces quantum fluctuation noise, increases the signal‑to‑noise ratio, and thereby enhances the detectability of ΔP—this process that does not change the signal itself but amplifies its distinguishability within the noise. Working in synergy, these two mechanisms bring ΔP to an experimentally detectable level, ensuring that even a weak initial signal can be reliably captured. This paper presents a coherent, self-contained theory that, starting from the first principles and core properties of ITC theory, predicts observable effects and designs a clear experimental path for verification. Whether the outcome confirms the existence of a deep structure or imposes a more rigorous constraint on the no-signaling theorem, the work herein represents a significant step in our relentless pursuit to understand the ultimate nature of reality.