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Healthy Research Rewards
ResearchHub is incentivizing healthy research behavior. At this time, first authors of open access papers are eligible for rewards. Visit the publications tab to view your eligible publications.
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Ernest Y. Lee
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An Inverse Scattering Construction of the JMaRT Fuzzball
Ivanka Bozovic Jelisavcic
et al.
Sep 23, 2014
We present an inverse scattering construction in STU supergravity of thetwo-charge single-rotation JMaRT fuzzball. The key element in our constructionis the fact that with appropriate changes in the parameters, the JMaRT fuzzballcan be smoothly connected to the Myers-Perry instanton.
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Many-point classical conformal blocks and geodesic networks on the hyperbolic plane
Ivanka Bozovic Jelisavcic
et al.
Oct 21, 2016
We study the semiclassical holographic correspondence between 2d CFT n-pointconformal blocks and massive particle configurations in the asymptotically AdS3space. On the boundary we use the heavy-light approximation in which case twoof primary operators are the background for the other (n-2) operatorsconsidered as fluctuations. In the bulk the particle dynamics can be reduced tothe hyperbolic time slice. Although lacking exact solutions we neverthelessshow that for any n the classical n-point conformal block is equal to thelength of the dual geodesic network connecting n-3 cubic vertices of worldlinesegments. To this end, both the bulk and boundary systems are reformulated aspotential vector fields. Gradients of the conformal block and geodesic lengthare given respectively by accessory parameters of the monodromy problem andparticle momenta of the on-shell worldline action represented as a function ofinsertion points. We show that the accessory parameters and particle momentaare constrained by two different algebraic equation systems which neverthelesshave the same roots thereby guaranteeing the correspondence.
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Observational signatures from horizonless black shells imitating rotating black holes
Pieter Desmet
et al.
Dec 1, 2017
In arXiv:1705.10172 it was proposed that string theory replaces Schwarzschildblack holes with horizonless thin shells with an AdS interior. In this paper weextend the analysis to slowly rotating black holes, solving theIsrael-Lanczos-Sen junction conditions for a rotating shell composed of stringymatter to determine the metric. Outside of the shell we find a vacuum solutionthat differs from Kerr with a 32% larger quadrupole moment. We discuss theobservational consequences and explore the possibility to distinguish between ablack shell and a black hole. Promising methods include imaging of the blackhole at the center of the Milky Way using the Event Horizon Telescope,precision measurements of stars in close orbits around the central black hole,and future observations of colliding super massive black holes using the spacebased gravitational wave observatory LISA.
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