Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Lettere al nuovo cimento della societa italiana di fisica/Lettere al nuovo cimento

Towards understanding quantum mechanics, general relativity and the tachyonic causality paradoxes

Matej Pavšič

Published Jan 1, 1981• 23 citations
Publisher
DOI
10.1007/bf02817321

Related papers

Quantum Entanglement - Can Reality Really be this Weird?

Allan Goff

*Special Relativity places severe constraints on any possibility for faster-than-light (FTL) phenomenon. There are four hopes for FTL; warp drive via General Relativity Theory (GRT), wormholes via GRT, tachyons, and quantum mechanics. This talk focuses on why quantum mechanics makes the list. The nonlocal nature of matter demonstrates correlations between distant events that cannot be explained by current concepts of causality. For two classical events to be correlated, either one causes the other, or both possess a common cause in their past light cones. Neither kind of causality can explain the correlations observed in entangled quantum systems. Reality seems to support a third mysterious type of causality, with an essential spacelike nature, but direct spacelike causality should be impossible as it would lead to temporal paradox. The two concepts of classical causality, timelike causes and common cause, are presented along with a review of the EPR experiment showing that something like spacelike causality exists between the distant parts of an entangled quantum system. Bell’s Inequality shows that the EPR correlations cannot be attributed to common causes. Gisin’s EPR-Relativity experiment shows that timelike causes cannot explain the EPR correlations either. The metaphor of Quantum Tic-Tac-Toe is used to show a third type of causality applicable only to quantum situations. This third type of causality is an indirect spacelike cause acting through multiple classical realities, permitting FTL but prohibiting temporal paradox. I. Introduction HIS paper considers the issue of causality in entangled quantum systems. The Background section reviews the two classical notions of causality, EPR type entanglements, and Special Relativity. The Common Cause section reviews Bell’s Inequality theorem and shows how this type of causality cannot explain the correlations seen in entangled systems. The Einsteinian Causality section reviews Gisin’s experiment demonstrating that time-like causality cannot explain these correlations either. Gisin’s conclusion is that quantum systems support a new mysterious 3 rd type of causality. The Quantum Causality section introduces a situation in Quantum Tic-Tac-Toe that exhibits this same kind of causality

AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit (JPC)•Jul 9, 2006•0 citations

General Relativity and Quantum Theory

Ernst Schmützer

Springer eBooks•Jan 1, 1977•0 citations

Special relativity, causality and quantum mechanics — 1

Guruprasad Kar, Samir Kunkri, Sujit K. Choudhary

Resonance•Aug 1, 2006•3 citations

Bridge between General Relativity and Quantum Mechanics: Causal-Information Synthesis and Its Machine Verification V. Veselo∗

The Institute for Applied Ontological Mathematics

We present a conceptual and partially formalized framework in which general relativity (GR) and quantum mechanics (QM) are viewed not as competing theories, but as descriptions of different phases of a single causal-informational process. GR describes actualized geometric reality (the space of effects E), while QM describes the emergence of this reality from a pre-geometric domain of potentials (the space of causes C). The key element is a map Φ : C → E that preserves information but breaks time symmetry. For the first time, we propose a rigorous mathematical framework fully verified in the Lean 4 proof assistant, including bridges between spectral dimension, algebraic nuclei, and Čech topological obstructions. This synthesis resolves the measurement problem, the continuum limit problem, and Zeno's paradox, and yields testable predictions for the primordial perturbation spectrum, gravitational wave dispersion, and variation of the fine-structure constant. Published by The Institute for Applied Ontological Mathematics.

•Oct 11, 2026•0 citations

The Relativity and Quantum Theories

Science•May 4, 1934•0 citations

Tachyons and Quantum Statistics

Raymond Fox

A number of years ago, Bohm postulated the existence of a quantum potential in order to create a completely causal description of nonrelativistic quantum mechanics. It is shown that this quantum potential must be a tachyon field. An experimental test of the identification of tachyons with Bohm's quantum potential is described. It is shown that though in the above experiment spacelike intervals are investigated, the information arrives after timelike intervals. The experiment thus provides an example where tachyons can affect a measured quantity though they cannot be used to violate causality.

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields•Jan 15, 1972•28 citations
*Special Relativity places severe constraints on any possibility for faster-than-light (FTL) phenomenon. There are four hopes for FTL; warp drive via General Relativity Theory (GRT), wormholes via GRT, tachyons, and quantum mechanics. This talk focuses on why quantum mechanics makes the list. The nonlocal nature of matter demonstrates correlations between distant events that cannot be explained by current concepts of causality. For two classical events to be correlated, either one causes the other, or both possess a common cause in their past light cones. Neither kind of causality can explain the correlations observed in entangled quantum systems. Reality seems to support a third mysterious type of causality, with an essential spacelike nature, but direct spacelike causality should be impossible as it would lead to temporal paradox. The two concepts of classical causality, timelike causes and common cause, are presented along with a review of the EPR experiment showing that something like spacelike causality exists between the distant parts of an entangled quantum system. Bell’s Inequality shows that the EPR correlations cannot be attributed to common causes. Gisin’s EPR-Relativity experiment shows that timelike causes cannot explain the EPR correlations either. The metaphor of Quantum Tic-Tac-Toe is used to show a third type of causality applicable only to quantum situations. This third type of causality is an indirect spacelike cause acting through multiple classical realities, permitting FTL but prohibiting temporal paradox. I. Introduction HIS paper considers the issue of causality in entangled quantum systems. The Background section reviews the two classical notions of causality, EPR type entanglements, and Special Relativity. The Common Cause section reviews Bell’s Inequality theorem and shows how this type of causality cannot explain the correlations seen in entangled systems. The Einsteinian Causality section reviews Gisin’s experiment demonstrating that time-like causality cannot explain these correlations either. Gisin’s conclusion is that quantum systems support a new mysterious 3 rd type of causality. The Quantum Causality section introduces a situation in Quantum Tic-Tac-Toe that exhibits this same kind of causality
We present a conceptual and partially formalized framework in which general relativity (GR) and quantum mechanics (QM) are viewed not as competing theories, but as descriptions of different phases of a single causal-informational process. GR describes actualized geometric reality (the space of effects E), while QM describes the emergence of this reality from a pre-geometric domain of potentials (the space of causes C). The key element is a map Φ : C → E that preserves information but breaks time symmetry. For the first time, we propose a rigorous mathematical framework fully verified in the Lean 4 proof assistant, including bridges between spectral dimension, algebraic nuclei, and Čech topological obstructions. This synthesis resolves the measurement problem, the continuum limit problem, and Zeno's paradox, and yields testable predictions for the primordial perturbation spectrum, gravitational wave dispersion, and variation of the fine-structure constant. Published by The Institute for Applied Ontological Mathematics.
A number of years ago, Bohm postulated the existence of a quantum potential in order to create a completely causal description of nonrelativistic quantum mechanics. It is shown that this quantum potential must be a tachyon field. An experimental test of the identification of tachyons with Bohm's quantum potential is described. It is shown that though in the above experiment spacelike intervals are investigated, the information arrives after timelike intervals. The experiment thus provides an example where tachyons can affect a measured quantity though they cannot be used to violate causality.