Weak Gravity Conjecture and Extremal Black Holes

Cottrell, W.D.; Shiu, Gary; Soler, Pablo

doi:10.48550/arxiv.1611.06270

Cited by 9 publications

(21 citation statements)

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“…The Hiscock-Weems model captures this phenomenon, albeit with non-thermal charge loss 3 . Thus, as emphasized by Hiscock and Weems, both dM/ dt and dQ/ dt terms above are part of the Hawking radiation 4 .…”

Section: How Charged Black Holes Evolved In Einstein-maxwell Theorymentioning

confidence: 81%

“…In contrast, in Fig. (4), the mass dissipation regime is almost the same size as the charge dissipation regime, in which black holes discharge steadily.…”

Section: How Charged Black Holes Evolved In Einstein-maxwell Theorymentioning

confidence: 86%

“…The WGC ensures that, among other things, an extremal black hole is unstable and can thus decay into non-extremal black holes via charged particle production (despite its Hawking temperature being zero) [3,4]. One might even suspect that with the WGC, near-extremal black holes can discharge efficiently and avoid becoming extremal in the first place.…”

Section: Introduction: Gravity Is Weakmentioning

confidence: 99%

“…"All models are wrong, some are useful." -George E. P. Box 4. In the literature, it is common to refer to only the thermal channel as "Hawking radiation".…”

mentioning

confidence: 99%

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The Charge of Electron, Weak Gravity Conjecture and Black Hole Evolution

Ong¹

2019

Preprint

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Section: How Charged Black Holes Evolved In Einstein-maxwell Theorymentioning

confidence: 81%

“…In contrast, in Fig. (4), the mass dissipation regime is almost the same size as the charge dissipation regime, in which black holes discharge steadily.…”

Section: How Charged Black Holes Evolved In Einstein-maxwell Theorymentioning

confidence: 86%

Section: Introduction: Gravity Is Weakmentioning

confidence: 99%

“…"All models are wrong, some are useful." -George E. P. Box 4. In the literature, it is common to refer to only the thermal channel as "Hawking radiation".…”

mentioning

confidence: 99%

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The Charge of Electron, Weak Gravity Conjecture and Black Hole Evolution

Ong¹

2019

Preprint

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“…That is, the WGC requires that there should exist at least one particle species of which q/m > 1. The WGC ensures that, among other things, an extremal black hole is unstable and can thus decay into a non-extremal one via charged particle production though the Schwinger effect (despite its Hawking temperature being zero) [60,61], or by splitting into smaller black holes (it is subtler than this, see the Discussion section). The WGC is crucial if we want to avoid a large (if not infinite) number of stable extremal black hole remnants.…”

Section: A Connection To the Weak Gravity Conjecturementioning

confidence: 99%

How Not to Extract Information From Black Holes: Cosmic Censorship as a Guiding Principle

Di Gennaro,

Ong

2021

Preprint

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Black holes in general relativity are commonly believed to evolve towards a Schwarzschild state as they gradually lose angular momentum and electrical charge under Hawking evaporation. However, when Kim and Wen applied quantum information theory to Hawking evaporation and argued that Hawking particles with maximum mutual information could dominate the emission process, they found that charged black holes tend towards extremality. In view of some evidence pointing towards extremal black holes being effectively singular, this would violate the cosmic censorship conjecture. In this work, we clarified the difference between the two models -they pertain to two different regimes. By taking into account the discreteness of the charge-to-mass ratio of finite species of charged particles, we also obtained a clearer picture of the end state of Hawking evaporation. We found that in agreement with the weak gravity conjecture, if there is no particle with charge-to-mass ratio q/m > 1, stable remnant states are formed, though they are non-extremal. Furthermore, and more surprisingly, we show that extremality can be reached if there exists a particle with q/m < 1, even in the presence of other particles with q/m > 1. This may explain why there is no charged particle with q/m < 1 in the Standard Model of particle physics. Cosmic censorship could thus play a bigger role in fundamental physics than previously thought.

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Scalar fields, hierarchical UV/IR mixing and the Weak Gravity Conjecture

Lüst

Palti

2018

J. High Energ. Phys.

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The Weak Gravity Conjecture (WGC) bounds the mass of a particle by its charge. It is expected that this bound can not be below the ultraviolet cut-off scale of the effective theory. Recently, an extension of the WGC was proposed in the presence of scalar fields. We show that this more general version can bound the mass of a particle to be arbitrarily far below the ultraviolet cut-off of the effective theory. It therefore manifests a form of hierarchical UV/IR mixing. This has possible implications for naturalness. We also present new evidence for the proposed contribution of scalar fields to the WGC by showing that it matches the results of dimensional reduction. In such a setup the UV/IR mixing is tied to the interaction between the WGC and non-local gauge operators.

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Weak Gravity Conjecture and Extremal Black Holes

Cited by 9 publications

References 0 publications

The Charge of Electron, Weak Gravity Conjecture and Black Hole Evolution

The Charge of Electron, Weak Gravity Conjecture and Black Hole Evolution

How Not to Extract Information From Black Holes: Cosmic Censorship as a Guiding Principle

Scalar fields, hierarchical UV/IR mixing and the Weak Gravity Conjecture

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