Results 41 to 50 of about 115,140,986 (222)

Finite black hole entropy and string theory [PDF]

Physical Review D, 1994
17 pages, 1 figure, Florida Preprint UFIFT-HEP-94 ...
openaire   +3 more sources

Massive vector fields in Kerr-Newman and Kerr-Sen black hole spacetimes

Journal of High Energy Physics, 2020
The superradiant instability modes of ultralight massive vector bosons are studied for weakly charged rotating black holes in Einstein-Maxwell gravity (the Kerr- Newman solution) and low-energy heterotic string theory (the Kerr-Sen black hole).
Ramiro Cayuso, Oscar J.C. Dias, Finnian Gray, David Kubizňák, Aoibheann Margalit, Jorge E. Santos, Renato Gomes Souza, Leander Thiele   +7 more
doaj   +1 more source

Gravitational footprints of black holes and their microstate geometries

Journal of High Energy Physics, 2021
We construct a family of non-supersymmetric extremal black holes and their horizonless microstate geometries in four dimensions. The black holes can have finite angular momentum and an arbitrary charge-to-mass ratio, unlike their supersymmetric cousins ...
Ibrahima Bah, Iosif Bena, Pierre Heidmann, Yixuan Li, Daniel R. Mayerson   +4 more
doaj   +1 more source

Black holes lessons from multipole ratios

Journal of High Energy Physics, 2021
We explain in detail how to calculate the gravitational mass and angular momentum multipoles of the most general non-extremal four-dimensional black hole with four magnetic and four electric charges.
Iosif Bena, Daniel R. Mayerson
doaj   +1 more source

Organic Materials of Tomorrow: Horizons of Artificial Intelligence

Advanced Materials, EarlyView.
This review examines machine learning techniques accelerating the discovery of organic semiconductors by linking molecular structure to properties. Key methods include graph neural networks, generative models, and active learning. Applications to organic photovoltaics demonstrate practical impact.
Harold Mena, J. Terence Blaskovits, Kun‐Han Lin, Denis Andrienko   +3 more
wiley   +1 more source

Non-supersymmetric F1-P black rings

Journal of High Energy Physics
We construct singly and doubly spinning non-supersymmetric F1–P black ring solutions in five-dimensional supergravity. These black rings have regular horizons and non-zero temperature.
Pavan Dharanipragada, Gurmeet Singh Punia, Amitabh Virmani   +2 more
doaj   +1 more source

Large‐Scale Determination of Frontier Orbital Energies of Disordered Small‐Molecule Organic Semiconductors Using Exciplex Emission Spectra

Advanced Materials, EarlyView.
ABSTRACT Accurately knowing the frontier orbital energies of the structurally disordered small‐molecule organic semiconductors that are used in optoelectronic devices such as organic light‐emitting diodes is required to rationally improve their performance. Here, we show that these energies can be deduced with a large accuracy from the peak energies of
Christian B. McDonald, Hiroki Tomita, Giacomo Cotelli, Louka L. Brüll, Nanno G. de Rooij, Lucas R.L. Norg, Milo Clément, Reinder Coehoorn   +7 more
wiley   +1 more source

Islands in linear dilaton black holes

Journal of High Energy Physics, 2021
We derive a novel four-dimensional black hole with planar horizon that asymptotes to the linear dilaton background. The usual growth of its entanglement entropy before Page’s time is established.
Georgios K. Karananas, Alex Kehagias, John Taskas   +2 more
doaj   +1 more source

Kaluza-Klein black holes in string theory [PDF]

Physical Review D, 1994
13p.
openaire   +3 more sources

Intelligent Maintenance Review for Robots: Multimodal Information, Deep Diagnosis and Embodied Artificial Intelligence

Advanced Robotics Research, EarlyView.
This review maps the methods to monitor robots’ health by fusing vibration, sound, control signals, vision, force, and oil information with artificial intelligence. It identifies deep learning, transfer learning, digital twins, and physics‐informed models as key methodological pathways enabling earlier diagnosis, safer human–robot collaboration, and ...
Yuting Qiao, Hongbo Wang, Naipeng Li, Shuo Wang, Yaguo Lei, Tonghai Wu, Junyi Cao   +6 more
wiley   +1 more source