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Analysis

This paper explores the connection between the holographic central charge, black hole thermodynamics, and quantum information using the AdS/CFT correspondence. It investigates how the size of the central charge (large vs. small) impacts black hole stability, entropy, and the information loss paradox. The study provides insights into the nature of gravity and the behavior of black holes in different quantum gravity regimes.
Reference

The paper finds that the entanglement entropy of Hawking radiation before the Page time increases with time, with the slope determined by the central charge. After the Page time, the unitarity of black hole evaporation is restored, and the entanglement entropy includes a logarithmic correction related to the central charge.

Traversable Ghost Wormholes Explored

Published:Dec 26, 2025 19:40
1 min read
ArXiv

Analysis

This paper explores the theoretical possibility of 'ghost stars' within the framework of traversable wormholes. It investigates how these objects, characterized by arbitrarily small mass and negative energy density, might exist within wormhole geometries. The research highlights potential topological obstructions to their straightforward realization and provides a concrete example using a Casimir-like wormhole. The analysis of the Penrose-Carter diagram further illustrates the properties of the resulting geometry.
Reference

The paper demonstrates that a Casimir-like traversable wormhole can be naturally constructed within this framework.

Analysis

This article presents a unified analysis of the scattering of massless waves with arbitrary spin in the context of Schwarzschild-type medium black holes. The research likely explores the behavior of these waves as they interact with the gravitational field of these black holes, potentially providing insights into phenomena like Hawking radiation or gravitational lensing. The 'unified analysis' suggests a comprehensive approach, possibly encompassing different spin values and potentially different black hole parameters.
Reference

The article's focus on 'unified analysis' implies a significant contribution to the understanding of wave scattering in strong gravitational fields.