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Mass (re)distribution for quantum dust cores of black holes (2501.07219v2)

Published 13 Jan 2025 in gr-qc, math-ph, and math.MP

Abstract: The collective ground state for a spherical symmetric dust ball has been investigated recently in [R. Casadio, Phys. Lett. B 843 (2023) 138055]. In this study, we refine that model by obtaining a mass distribution that accounts for the superposition of wavefunctions across different layers. The refined mass distribution shows significant deviations from the approximation without quantum superpositions. Specifically, the new nearly parabolic distribution replaces the linear mass profile of the original work, featuring an overall downward concavity, which leads to a non-vanishing tension. Notably, the regularity of the metric and causal structure are preserved in the refined analysis.

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Summary

  • The paper introduces a refined quantum model for black hole dust cores using wavefunction superpositions, revealing a nearly parabolic mass distribution.
  • This new model accounts for mass contributions across layers via a matrix derived from probability densities, yielding a non-linear mass distribution function.
  • The study confirms the preservation of metric regularity and causal structure within the core despite the complex quantum mass re-distribution.

Mass (Re)distribution for Quantum Dust Cores of Black Holes: An Analytical Overview

The research paper titled "Mass (re)distribution for quantum dust cores of black holes" introduces a refined quantum model to analyze the internal structure of black hole cores, particularly focusing on spherical symmetric dust balls. This investigation extends upon previous work, notably "Quantum dust cores of black holes," which considered a simplistic linear mass distribution. The model's enhancement arises from accounting for quantum superpositions of wavefunctions across various layers of the black hole's dust core.

The authors present a methodology to define an innovative mass distribution that deviates significantly from the initial linear approximation. They assert that the combination of the wavefunctions results in a nearly parabolic mass distribution characterized by an overall downward concavity. This refined structure introduces the concept of non-vanishing tension within these celestial bodies. Importantly, the paper confirms that despite these complex alterations, the regularity of the metric and causal structure, crucial aspects of the underlying spacetime, are preserved.

Methodological Refinements

The paper details the process of accounting for the quantum superpositions through a discretization approach. The dust ball core is divided into multiple layers, each with specific masses and radial coordinates. The quantum state for each layer is determined by solving the Schrödinger equation to obtain ground state wavefunctions. A significant contribution of the research is the derivation of a matrix that tracks mass contributions across different layers, derived from the probability densities of the particles' locations. This highlights a novel mass distribution function, leading to the non-linear equation that reconciles physical intuition with quantum mechanical predictions.

Theoretical and Practical Implications

From a theoretical standpoint, the research provides insights into the stability and behavior of black hole cores under quantum mechanics. The emphasis on wavefunction overlaps suggests a dynamic equilibrium state influenced by quantum mechanics, offering prospects for interpreting the regularization of spacetime singularities—a traditional motivator for merging general relativity with quantum mechanics.

Practically, the developed model has significant implications for comprehending black hole interiors, potentially influencing observational and theoretical astrophysics. By offering a metric that remains regular throughout the core, this refinement could support gravitational wave studies and inform the characteristics of high-energy astrophysical phenomena surrounding black holes.

Numerical Analysis and Results

Through numerical simulations, a marked deviation from the original linear approximation of mass distribution is demonstrated. The authors provide a parabolic correction function influencing the inner structure of black holes, effectively capturing quantum mechanical effects. The mathematical portrayal reveals layers with distinct masses that collectively influence the global mass function, allowing particles to reside in unexpected layers.

Outlook

This research opens avenues for future studies on the equilibrium nature of black holes, underpinning the role quantum physics may play in resolving the singularity problem. It suggests further exploration into the iterative correctness of mass distribution models and their convergence properties. Future work might also consider the computational demands of handling larger black hole masses versus layer numbers.

In conclusion, the paper provides a sophisticated quantum mechanical framework for the paper of black hole interiors. It bridges concepts of quantum superposition with classical mass distribution models, offering a nuanced understanding of black hole cores and their geometric regularity. Through meticulous analytical and numerical methods, it aligns theoretical predictions with the potential quantum nature of these cosmic marvels.

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