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A Quantum-Dot Information-Storage Model under a Discrete-Spacetime Framework and Its Logical Association with Time Travel

Xiang Yin

Published May 31, 2026• 0 citations
Publisher

Abstract

Starting from the discrete spacetime structure predicted by loop quantum gravity (LQG), this paper constructs a universal model of quantum-dot information storage and systematically explores its logical correlation with time travel. We first formulate the discreteness of spacetime at the Planck scale and argue that the discrete spectra of geometric operators (area and volume) provide a natural quantized substrate for information storage. Crucially, we do not assert a direct physical isomorphism between Planck-scale spacetime quanta and mesoscopic quantum-dot spin states—a gap of roughly 26 orders of magnitude. Instead, using renormalization-group (RG) ideas and scale invariance, we reframe the link as a topological isomorphism of information structure and, operationally, as a quantum simulation: a quantum-dot array is a laboratory simulator of the discrete-spacetime information network rather than a physical counterpart of Planck-scale atoms. To address the causal paradoxes of closed timelike curves (CTCs), we propose a quantum-information self-consistency principle and connect it to Deutsch’s D-CTC model (1991; density-matrix fixed point) and the Lloyd et al. P-CTC model (2011; post-selected CTCs). We argue that spacetime discreteness supplies a natural ultraviolet cutoff which, together with non-local (entanglement-based) storage in the dot network, dissolves the grandfather paradox at the level of information. The metaphysical “isomorphism claim” is sharpened into a falsifiable “same-universality-class” hypothesis, accompanied by concrete criteria (entanglement-entropy scaling, power-law exponents, topological entanglement entropy). The proposed quantum-dot loop experiment is clarified as a quantum simulation of the information-propagation logic of CTCs, in the same paradigm as the Sycamore traversable-wormhole experiment (Jafferis et al., 2022), and is not a realization of macroscopic time travel. Building on the above, this paper advances two core theoretical constructs, each developed in a dedicated chapter. The first is the quantum-dot information-extension model (Chapter 8): the existence of a piece of spacetime information is identified with the existence of a timelike information world-tube—when information is created at an event, the quantum point carrying it extends along a timelike direction into a world-tube that persists until the information is erased. From this picture we derive a conservation law for the active quantum-point number density, a holographic–persistence capacity bound for the world-tube cross-section, and the thermodynamic costs of information creation, persistence, and annihilation. The second is the information dynamics of time travel (Chapter 9): within the world-tube language, two self-consistent routes for returning to the past are proposed—jumping to a parallel branch universe that already possesses a time machine (memory fully retained), or rewinding along one's own world-tube so that the extended quantum point recedes and annihilates at its initial event (entailing invalidation of downstream information, merging of the future and past operators' information, and the impossibility of retaining future memory). The two routes correspond respectively to cross-branch and same-branch fixed points of the causal-consistency functional. We emphasize that the pictures of Chapters 8 and 9 are theoretical hypotheses and conjectures proposed herein, intended to provide a mathematically self-consistent and in-principle falsifiable analytical framework rather than a claim about the physical realizability of time machines.

DOI
10.5281/zenodo.20475366

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Starting from the discrete spacetime structure predicted by loop quantum gravity (LQG), this paper constructs a universal model of quantum-dot information storage and systematically explores its logical correlation with time travel. We first formulate the discreteness of spacetime at the Planck scale and argue that the discrete spectra of geometric operators (area and volume) provide a natural quantized substrate for information storage. Crucially, we do not assert a direct physical isomorphism between Planck-scale spacetime quanta and mesoscopic quantum-dot spin states—a gap of roughly 26 orders of magnitude. Instead, using renormalization-group (RG) ideas and scale invariance, we reframe the link as a topological isomorphism of information structure and, operationally, as a quantum simulation: a quantum-dot array is a laboratory simulator of the discrete-spacetime information network rather than a physical counterpart of Planck-scale atoms. To address the causal paradoxes of closed timelike curves (CTCs), we propose a quantum-information self-consistency principle and connect it to Deutsch’s D-CTC model (1991; density-matrix fixed point) and the Lloyd et al. P-CTC model (2011; post-selected CTCs). We argue that spacetime discreteness supplies a natural ultraviolet cutoff which, together with non-local (entanglement-based) storage in the dot network, dissolves the grandfather paradox at the level of information. The metaphysical “isomorphism claim” is sharpened into a falsifiable “same-universality-class” hypothesis, accompanied by concrete criteria (entanglement-entropy scaling, power-law exponents, topological entanglement entropy). The proposed quantum-dot loop experiment is clarified as a quantum simulation of the information-propagation logic of CTCs, in the same paradigm as the Sycamore traversable-wormhole experiment (Jafferis et al., 2022), and is not a realization of macroscopic time travel. Building on the above, this paper advances two core theoretical constructs, each developed in a dedicated chapter. The first is the quantum-dot information-extension model (Chapter 8): the existence of a piece of spacetime information is identified with the existence of a timelike information world-tube—when information is created at an event, the quantum point carrying it extends along a timelike direction into a world-tube that persists until the information is erased. From this picture we derive a conservation law for the active quantum-point number density, a holographic–persistence capacity bound for the world-tube cross-section, and the thermodynamic costs of information creation, persistence, and annihilation. The second is the information dynamics of time travel (Chapter 9): within the world-tube language, two self-consistent routes for returning to the past are proposed—jumping to a parallel branch universe that already possesses a time machine (memory fully retained), or rewinding along one's own world-tube so that the extended quantum point recedes and annihilates at its initial event (entailing invalidation of downstream information, merging of the future and past operators' information, and the impossibility of retaining future memory). The two routes correspond respectively to cross-branch and same-branch fixed points of the causal-consistency functional. We emphasize that the pictures of Chapters 8 and 9 are theoretical hypotheses and conjectures proposed herein, intended to provide a mathematically self-consistent and in-principle falsifiable analytical framework rather than a claim about the physical realizability of time machines.
We propose a renormalization-group (RG) universality-class hypothesis linking the discrete-spacetime information network predicted by loop quantum gravity (LQG) to the entanglement network of a semiconductor quantum-dot array, deliberately avoiding any claim of microscopic isomorphism across the orders of magnitude separating the Planck and mesoscopic scales. Within this framework, Deutsch’s D-CTC and the Lloyd–Maccone post-selected (P-CTC) formulations of closed timelike curves (CTCs) are grounded on a discrete ultraviolet cutoff and non-local entanglement-based storage, and the area-law information capacity of the discrete network and the area-law entanglement of a gapped quantum-dot ground state are placed in the same universality class. We design a four-dot entanglement-loop quantum-simulation scheme—methodologically analogous to the Sycamore traversable-wormhole experiment of Jafferis et al.—for testing the information logic of CTCs on solid-state hardware, formulate explicit component-wise falsifiability criteria via a universality-class observable vector, and clearly delineate the epistemic boundary between substrate-independent universal-information claims (testable on the simulator) and substrate-specific quantum-gravity phenomenology (testable only by astrophysical means).
The hypothesis that spacetime possesses a discrete structure at the Planck scale - potentially composed of quantized tetrahedral or simplicial building blocks - arises naturally in background-independent approaches to quantum gravity such as Loop Quantum Gravity (LQG) and Causal Dynamical Triangulations (CDT). In these frameworks, spatial geometry emerges from spin networks of quantum tetrahedra with discrete area and volume spectra, while spacetime evolution proceeds via spin foams or summed triangulations. Roger Penrose’s Objective Reduction (OR) mechanism further posits that quantum superpositions of massive states generate incompatible spacetime curvatures whose gravitational self-energy difference triggers an objective collapse when the associated energy uncertainty reaches ħ/τ, implicitly requiring a non-continuous spacetime geometry. This article presents an exhaustive theoretical foundation and proposes a hybrid tabletop experiment - the Planck Geometry Interferometer - designed to simultaneously measure gravitational phase shifts arising from proper-time differences and spontaneous collapse lifetimes. By placing mesoscopic masses in spatial superpositions and monitoring quantized deviations in phase or collapse time, the experiment can distinguish discrete tetrahedral geometries (LQG-style) from continuous spacetime or pure Penrose foam. Building directly on existing proposals, the setup is shown to be within reach of current optomechanical, cryogenic, and interferometric technologies. Detailed protocols, expected signatures of discreteness, feasibility assessments, and implications for falsifying or confirming Planck-scale discreteness are provided. A negative result would constrain or refute these models; a positive detection of quantization would constitute direct empirical evidence for discrete spacetime.
This work introduces a new discrete framework that links the flow of information in weighted networks to emergent informational torsion and discrete closed timelike curves (CTCs). By connecting edge weights, dependent on mutual information, to Forman-Ricci curvature and defining persistent cycle circulations, we uncover self-sustained loops that act as discrete analogues of local causal reversals. Starting from multipartite quantum states represented as graphs, we show how specific entanglement patterns can generate effective geometric deformations. Promoting the model to a quantum formalism allows us to define curvature and circulation operators, giving a concrete way to study the quantum dynamics of these emergent structures. This framework provides a bridge between different areas of physics: quantum information theory, discrete geometry, and ideas of emergent gravity. It opens the door to exploring how entanglement and informational flows might shape causal structures, offering both conceptual insights and numerical tools that could inspire future developments in fundamental theory and quantum technologies.
The incompatibility between General Relativity and Quantum Mechanics necessitates a reevaluation of spacetime ontology. This paper proposes a Discrete Dynamic Ledger (DDL) model, defining time as a sequence of discrete state-nodes within a directed acyclic graph. Based on Wheeler’s delayed-choice experiment, we argue that historical states lack absolute determinacy until retroactively fixed by present observations, and predictions based on past states are merely decohered "abandoned futures." We introduce "Local Causal Closure": entangled particles and the observer's physical operation share a single topological node in the fundamental ledger. Through partial trace and quantum channel formulations, it is demonstrated that this synchronization requires no superluminal signaling. The observer is strictly defined by the macroscopic irreversible physical entanglement (Lindblad decoherence) formed by the unification of decision and action, independent of consciousness. Integrating the Holographic Principle and the ER=EPR conjecture, a modified interference phase formula is derived at the Planck scale. Overwritten histories are shown to transform into a "Static Information Ground State"—an eternal stillness (Ataraxia) that preserves information without energy inflation.
This paper presents SCAR, short for Space-Time Causal Associative Record, as a speculative hypothesis for a discrete causal-information substrate of spacetime. The central proposal is that a qualifying entanglement-producing direct causal interaction writes a persistent relational record, called a SCAR, into an underlying causal structure. We define a finite covariant history space whose physical elements are unlabeled isomorphism classes of causal orders decorated by local quantum-process classes and SCAR records. Each SCAR contains a relational record label, a local-unitary-invariant persistence sector, and a bounded magnitude determined by entanglement. A label-invariant statistical history ensemble is proposed, with a minimal action that couples causal-link structure to the concentration of SCAR magnitude. The framework is explicitly presented as a finite toy model and hypothesis rather than an established theory of physics. It does not derive the Born rule, Lorentz symmetry, an effective spacetime metric, general relativity, quantum field theory, or an empirical prediction for the observed universe. Its immediate purpose is to formulate a falsifiable research program in which covariance, quantum consistency, continuum emergence, and phenomenology can be tested progressively.
Withdrawal notice (added by the author). This record was an exploratory, AI-assisted working draft. Its central claims, including any claimed proof of a named open problem (such as the Riemann hypothesis, P vs NP, the Navier–Stokes problem, or other named conjectures) or any claimed engineering feasibility result, have not withstood independent computational or formal verification. The author withdraws those claims in full. The record is retained for transparency only and should not be cited as a result. We present a first-principles explanation for the non-local nature of quantum entanglement based on the universal self-adjoint integral operator framework. We show that quantum entanglement is not an intrinsic property of individual quantum particles, but a direct manifestation of the global coherence inherent in the continuous spectral Hilbert space of spacetime. The hyperbolic cosine integral kernel of the universal operator provides the microscopic ultraviolet cutoff for all interactions, while the non-local correlation of entanglement originates from the global nature of the Hilbert space itself. We derive the universal intrinsic decoherence rate of entangled states induced by Planck-scale spacetime spectral fluctuations, with quantitative scaling laws and numerical predictions for different physical systems. We give a consistent theoretical interpretation of the experimentally measured lower bound of the apparent entanglement speed, and demonstrate full compatibility with all existing Bell test results including the lower bound of >10^4 c. We also present four testable quantitative predictions verifiable with current or near-future experimental technology. Our theory resolves the long-standing paradox of quantum non-locality, and provides a unified description of quantum mechanics and relativistic spacetime structure. Keywords: Quantum entanglement; Non-locality; Spacetime structure; Self-adjoint operator; Spectral theory; Quantum foundations; Bell inequality; Intrinsic decoherence MSC 2020 Classification: 81P40; 81T20; 47B25; 83F05; 81P15