Appearance of de Sitter black holes and strong cosmic censorship

Cao, Li-Ming; Li, Long-Yue; Liu, Xia-Yuan; Zhou, Yu-Sen

doi:10.1103/physrevd.109.084021

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…1. This model has been extensively used in previous studies, as exemplified by references [12,17,[47][48][49][50][51][52][53][54][55][56][57][58][59] for spherically symmetric spacetimes and references [18,21,60] for axially symmetric spacetimes. We anticipate observing instances of disrupted or vanished photon rings.…”

Section: Introductionmentioning

confidence: 99%

Beijing Language and Culture University, China

Wang¹

2022

The Experience of Examining the PhD

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In the study of network synchronization, an outstanding question of both theoretical and practical significance is how to allocate a given set of heterogenous oscillators on a complex network in order for improving the synchronization performance. Whereas methods have been proposed to address this question in literature, the methods are based on accurate models describing the system dynamics, which, however, are normally unavailable in realistic situations. Here we show that this question can be addressed by the model-free technique of feed-forward neural network (FNN) in machine learning. Specifically, we measure the synchronization performance of a number of allocation schemes and use the measured data to train a machine. It is found that the trained machine is able to not only infer the synchronization performance of any new allocation scheme, but also find from a huge amount of candidates the optimal allocation scheme for synchronization.

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Section: Introductionmentioning

confidence: 99%

Beijing Language and Culture University, China

Wang¹

2022

The Experience of Examining the PhD

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Black hole shadow of quantum Oppenheimer-Snyder–de Sitter spacetime

Luo,

2024

Phys. Rev. D

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Is a photon ring invariably a closed structure?

Wang,

Zhang

et al. 2024

Eur. Phys. J. C

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In this study, we investigate the image of a rotating compact object (CO) illuminated by a geometrically thin, optically thin disk on the equatorial plane. As the radius of the CO’s surface fluctuates, the CO may partially or entirely obscure the photon region. We observe that the perceived photon ring may exhibit discontinuities, deviating from a closed structure, and may even disappear entirely. We find that the disruption and disappearance of the photon ring are dependent on the observational angle-a novel phenomenon not previously observed in black hole imaging studies. Our study reveals that while the factors influencing this unique photon ring phenomenon are diverse and the outcomes complex, we can provide a clear and comprehensive explanation of the physical essence and variation trends of this phenomenon. We do this by introducing and analyzing the properties and interrelationships of three characteristic functions, $$\tilde{\eta }$$ η ~ , $$\eta _o$$ η o , and $$\eta _s$$ η s related to the photon impact parameters. Additionally, our analysis of the intensity cuts and inner shadows of the images uncovers patterns that differ significantly from the shadow curve.

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Appearance of de Sitter black holes and strong cosmic censorship

Cited by 3 publications

References 51 publications

Beijing Language and Culture University, China

Beijing Language and Culture University, China

Black hole shadow of quantum Oppenheimer-Snyder–de Sitter spacetime

Is a photon ring invariably a closed structure?

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