Results 71 to 80 of about 2,678,069 (257)
Charged AdS Black Holes in Presence of String Cloud and Cardy-Verlinde Formula [PDF]
arXiv, 2023 In this study, charged AdS black holes with a string cloud are taken into consideration. We identify three distinct black hole solutions within a specific temperature range, which subsequently merge into a single black hole beyond this range in the case of spherical space with low chemical potential and string density.
arxiv
STATIONARY STRINGS AND 2-D BLACK HOLES [PDF]
Nucl.Phys. B449 (1995) 149-158, 1995 A general description of string excitations in stationary spacetimes is developed. If a stationary string passes through the ergosphere of a 4-dimensional black hole, its world-sheet describes a 2-dimensional black (or white) hole with horizon coinciding with the static limit of the 4-dimensional black hole. Mathematical results for 2-dimensional black
arxiv +1 more source
Singular Electromagnetics: From Phase Singularities to Optical Skyrmions and Beyond
Advanced Physics Research, EarlyView.Singular electromagnetics/optics studies multidimensional topological defects of electromagnetic fields (also known as optical singularities), including phase and polarization singularities, 3D singularities (e.g., optical skyrmions, merons, hopfions, knots, links, and Möbius strips), and even higher‐dimensional singularities.
Jie Yang +3 more
wiley +1 more source
Family history of ADHD associates with stronger problem‐solving skills amongst 2‐ to 3‐year‐olds
JCPP Advances, EarlyView.In this study 129 UK 2‐ and 3‐year‐olds, and 74 Swedish 3‐year‐olds, with and without a family history of ADHD and autism, completed a problem‐solving task. Our results show that children with ADHD traits and/or a family history of ADHD are likely to have an aptitude for generative problem‐solving when presented with highly motivating, ecologically ...
Alexandra Hendry +12 more
wiley +1 more source
Non-supersymmetric black holes with α′ corrections
Journal of High Energy Physics, 2022 We study extremal 5- and 4-dimensional black hole solutions of the Heterotic Superstring effective action at first order in α′ with, respectively, 3 and 4 charges of arbitrary signs.
Pablo A. Cano +3 more
doaj +1 more source
Extremal Black Holes and Strings in Linear Dilaton Vacua [PDF]
Prog. Theor. Phys. 90 (1993) pp. 1259--1268, 2015 Analytic solutions to low-energy string theory, which describe arbitrary numbers of extreme `black holes (strings)' in linear dilaton vacua, are found.
arxiv +1 more source
Extreme dyonic black holes in string theory [PDF]
, 1996 Supersymmetric extreme dyonic black holes of toroidally compactified heterotic or type II string theory can be viewed as lower-dimensional images of solitonic strings wound around a compact dimension.
Tseytlin, A. A.
core +2 more sources
Small, EarlyView.This review describes recent (mostly last five years) progress in the synthesis, structural characterization, and properties of nanotubes from layered transition metal dichalcogenides, including in‐silico investigations. In the picture, ultra long multiwall nanotubes (up to 0.5 mm) nanotubes reported in Ref.
Lena Yadgarov, Reshef Tenne
wiley +1 more source
Maxwell’s equations in the Myers-Perry geometry
Journal of High Energy Physics, 2017 We demonstrate separability of the Maxwell’s equations in the Myers-Perry-(A)dS geometry and derive explicit solutions for various polarizations. Application of our construction to the four-dimensional Kerr black hole leads to a new ansatz for the ...
Oleg Lunin
doaj +1 more source
Arbitrary black-string deformations in the black string-black hole transitions [PDF]
Phys.Rev. D73 (2006) 064011, 2005 We study the possible black string-black hole transition by analyzing the structure of the apparent horizon for a large family of time-symmetric initial data. We observe that, as judged by the apparent horizon, it is possible to generate arbitrarily deformed black strings at a moment of time symmetry.
arxiv +1 more source