See a black hole on a shoestring

Heyl, Jeremy S.

doi:10.1103/physrevd.74.064029

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…More BEC-related developments appeared in [680,38,39,29,24,188,189]. An analogue model based on a suspended "shoestring" was explored in [282]. Super-resonance was again discussed in [352].…”

Section: The Year 2006mentioning

confidence: 99%

Analogue Gravity

Barceló

Liberati

Visser

2011

Living Rev. Relativ.

737

1,080

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Analogue gravity is a research programme which investigates analogues of general relativistic gravitational fields within other physical systems, typically but not exclusively condensed matter systems, with the aim of gaining new insights into their corresponding problems. Analogue models of (and for) gravity have a long and distinguished history dating back to the earliest years of general relativity. In this review article we will discuss the history, aims, results, and future prospects for the various analogue models. We start the discussion by presenting a particularly simple example of an analogue model, before exploring the rich history and complex tapestry of models discussed in the literature. The last decade in particular has seen a remarkable and sustained development of analogue gravity ideas, leading to some hundreds of published articles, a workshop, two books, and this review article. Future prospects for the analogue gravity programme also look promising, both on the experimental front (where technology is rapidly advancing) and on the theoretical front (where variants of analogue models can be used as a springboard for radical attacks on the problem of quantum gravity).

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Section: The Year 2006mentioning

confidence: 99%

Analogue Gravity

Barceló

Liberati

Visser

2011

Living Rev. Relativ.

737

1,080

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Section: Subject Headings: Gamma-rays: Bursts Theorymentioning

confidence: 82%

“…This process is continuous and involves no baryonic load. This analysis represents a non-perturbative extension of earlier calculations on pairproduction about the a Wald field [32,26,12].Pair-creation in magnetospheres around rotating black holes is made possible by the Rayleigh criterion, since radiation from the horizon posesses a specific angular momentum at least twice that of the black hole itself. The black hole may support open flux-tubes by an magnetic moment in equilibrium with a surrounding torus magnetosphere.…”

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confidence: 82%

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Transient sources from rotating black holes

Putten¹,

Levinson²,

t'Hooft³

2012

Relativistic Astrophysics of the Transient Universe

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Cosmological gamma-ray bursts are probably powered by systems harboring a rotating black hole. We show that frame-dragging creates baryon-poor outflows in a differentially rotating gap along an open magnetic flux-tube with dissipation P = Ω T (Ω H − 2Ω T )A 2 φ , where 2πA φ denotes the flux in the open tube, for angular velocities Ω H and Ω T of the black hole and the torus, respectively. The output in photon-pair ouflow will be reprocessed in an intervening hypernova progenitor wind or the ISM. Subject headings: gamma-rays: bursts, theoryCosmological gamma-ray bursts may be powered by rotating black holes following the collapse of young massive stars [33] in hypernovae [21,4] or the coalescence of black holeneutron star binaries [22]. If all black holes are produced by stellar collapse, they should be nearly maximally rotating [1,2], whose mass is relatively high [3,27]. The torus is expected to form from fallback matter stalled against an angular momentum barrier or as the debris of a neutron star following tidal break-up around a Kerr black hole. The torus will provide a similarly-shaped magnetosphere from the remnant magnetic field. The magnetic field strength derives from conservation of magnetic flux and linear amplification (see [21,15]).GRB/afterglow studies indicate an output in ultrarelativistic baryon poor jets. In this Letter, we show that frame-dragging creates powerful photon-pair outflows in a differentially rotating gap along open magnetic flux-tubes supported by black holes in equilibrium with a surrounding torus magnetosphere. This process is continuous and involves no baryonic load. This analysis represents a non-perturbative extension of earlier calculations on pairproduction about the a Wald field [32,26,12].Pair-creation in magnetospheres around rotating black holes is made possible by the Rayleigh criterion, since radiation from the horizon posesses a specific angular momentum at least twice that of the black hole itself. The black hole may support open flux-tubes by an magnetic moment in equilibrium with a surrounding torus magnetosphere. This is a consequence of a no fourth-hair theorem (see below). Frame-dragging introduces Faraday potential drops across these flux-tubes. This creates a competition between local equilibration into a dissipation-free state and current-continuity as a global constraint. Here, currents are determined by slip-slip boundary conditions on the horizon and infinity. As will be shown, the outcome of this competition is dissipation in a differentially rotating gap. This results in the creation of a photon-pair outflow to infinity.A torus surrounding a black hole faces the black hole horizon on the inside and infinity on the outside. These "two faces" are each equivalent in poloidal topology to pulsar magnetospheres with commensurate causal interactions, as shown in Fig. 1. The inner face of the torus receives energy and angular momentum, as does a pulsar when infinity wraps around it (see Fig. 2 of [25]); the outer face always looses energy and angular momentum s...

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“…Apesar de ainda ser baseado nas equações da hidrodinâmica, este modelo tem a vantagem de a velocidade do som no meio estar ligadaà profundidade do canal em que o fluido escoa o que a torna um parâmetro de fácil manipulação experimental. Na seção 6.2 mostraremos que pequenas oscilações em cordas tensionadas são capazes de simular espaços-tempos de 1 + 1dimensões[57]. Eles são interessantes, pois são capazes de representar espaços-tempos de 3 + 1 dimensões.…”

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Análogos de gravitação semi-clássica em física da matéria condensada

Lima¹

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See a black hole on a shoestring

Cited by 3 publications

References 16 publications

Analogue Gravity

Analogue Gravity

Transient sources from rotating black holes

Análogos de gravitação semi-clássica em física da matéria condensada

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