aqora

Quantum theoretical origin of spacetime structure

A. R. Marlow

International Journal of Theoretical PhysicsMay 1, 19864 citations

Spacetime as an Emergent Causal Structure: A Quantum Mechanical Perspective

Changlong Wen

This paper explores the fundamental nature of spacetime from the perspective of emergent causal structures, rooted in quantum mechanical principles. We propose a theoretical framework that treats spacetime not as a pre-existing background, but as a collective phenomenon arising from the interaction of quantum causal relations. By analyzing the constraints of causality and quantum coherence, we derive key implications for the emergence of classical spacetime geometry and the limits of local realism. Our results suggest a new way to bridge quantum mechanics and gravitational theory, providing a foundation for future studies in quantum gravity and spacetime physics.This paper explores the fundamental nature of spacetime from the perspective of emergent causal structures, rooted in quantum mechanical principles. We propose a theoretical framework that treats spacetime not as a pre-existing background, but as a collective phenomenon arising from the interaction of quantum causal relations. By analyzing the constraints of causality and quantum coherence, we derive key implications for the emergence of classical spacetime geometry and the limits of local realism. Our results suggest a new way to bridge quantum mechanics and gravitational theory, providing a foundation for future studies in quantum gravity and spacetime physics.

Mar 11, 20260 citations

Causal nonseparability and the structure of spacetime

Laurie Letertre

Quantum nonseparability is central to most philosophical puzzles related to quantum mechanics. Yet, it is not an exclusive property of quantum mechanics, as it is also found in theoretical generalizations thereof. Investigating the implications of quantum nonseparability in a broader context could shed a new light on the conceptual problems in quantum physics. This work focuses on an operational theory called the process matrix formalism that generalizes quantum mechanics by relaxing the assumption of a well-defined causal structure. That broader theoretical context allows for the existence of quantum processes that are causally nonseparable, i.e. for which there is no definite global causal order among its interacting elements. Therefore, this notion of causal nonseparability somehow extends the notion of entanglement to the geometry of spacetime.Quantum nonseparability is central to most philosophical puzzles related to quantum mechanics. Yet, it is not an exclusive property of quantum mechanics, as it is also found in theoretical generalizations thereof. Investigating the implications of quantum nonseparability in a broader context could shed a new light on the conceptual problems in quantum physics. This work focuses on an operational theory called the process matrix formalism that generalizes quantum mechanics by relaxing the assumption of a well-defined causal structure. That broader theoretical context allows for the existence of quantum processes that are causally nonseparable, i.e. for which there is no definite global causal order among its interacting elements. Therefore, this notion of causal nonseparability somehow extends the notion of entanglement to the geometry of spacetime.

Jan 1, 20190 citations

Quantum Mechanics and the Nature of Spacetime

The frontiers collectionJan 1, 20050 citations

Quantum mechanics versus relativity: an experimental test of the structure of spacetime

S. A. Emelyanov

We have performed an experimental test under the conditions in which quantum mechanics predicts spatially discontinuous single-particle transport. The transport is beyond the relativistic paradigm of movement in Cartesian space and therefore may well be nonlocal. Our test has demonstrated that such transport does exist. This fact opens the door for a realistic interpretation of quantum mechanics in so far as the requirement of Lorentz invariance appears inapplicable to any version of quantum theory. Moreover, as quantum mechanics proposes a particle dynamics beyond relativity, it automatically requires an adequate ‘quantum’ concept of spacetime, for which the relativistic concept is only a limiting case. The quantum concept allows absolute simultaneity and hence revives the notion of absolute time. It also goes beyond the relativistic curvilinear Cartesian order of space to account for quantum phenomena such as discontinuity and nonlocality in the spirit of Bohm's concept of the implicate order.We have performed an experimental test under the conditions in which quantum mechanics predicts spatially discontinuous single-particle transport. The transport is beyond the relativistic paradigm of movement in Cartesian space and therefore may well be nonlocal. Our test has demonstrated that such transport does exist. This fact opens the door for a realistic interpretation of quantum mechanics in so far as the requirement of Lorentz invariance appears inapplicable to any version of quantum theory. Moreover, as quantum mechanics proposes a particle dynamics beyond relativity, it automatically requires an adequate ‘quantum’ concept of spacetime, for which the relativistic concept is only a limiting case. The quantum concept allows absolute simultaneity and hence revives the notion of absolute time. It also goes beyond the relativistic curvilinear Cartesian order of space to account for quantum phenomena such as discontinuity and nonlocality in the spirit of Bohm's concept of the implicate order.

Physica ScriptaNov 1, 20123 citations

Quantum relativity theory and quantum space-time

Miklós Banai

International Journal of Theoretical PhysicsNov 1, 198415 citations

Spacetime Structure Implications from Quantum Mechanics and Relativity

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