Results 11 to 20 of about 8,909 (266)
T T ¯ $$ T\overline{T} $$ , black holes and negative strings
Journal of High Energy Physics, 2020 String theory on AdS3 has a solvable single-trace irrelevant deformation that is closely related to T T ¯ $$ T\overline{T} $$ . For one sign of the coupling, it leads to an asymptotically linear dilaton spacetime, and a corresponding Hagedorn spectrum ...
Soumangsu Chakraborty +2 more
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Loop Quantum Black Hole Extensions Within the Improved Dynamics
Frontiers in Astronomy and Space Sciences, 2021 We continue our investigation of an improved quantization scheme for spherically symmetric loop quantum gravity. We find that in the region where the black hole singularity appears in the classical theory, the quantum theory contains semi-classical ...
Rodolfo Gambini +2 more
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Articulating assemblage theory for salient urban atmospheres in children’s environments
Ain Shams Engineering Journal, 2021 In using the assemblage theory, this article focuses on the concepts of “city singularity” and “urban atmospheres” in designing better places for children.
Hisham Abusaada +2 more
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Bounce Universe with Finite-Time Singularity
Universe, 2022 This work explains how the presence of a Type-IV singularity (a mild singularity) can influence the dynamics of a bouncing universe. In particular, we examine the bounce cosmology that appears with a Type-IV singularity in the context of a ghost-free ...
Sergei D. Odintsov, Tanmoy Paul
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Singularity in signal theory [PDF]
International Journal of Control, 2008 A discrete-time random signal is singular if its values are singular random variables defined by a distribution function continuous but with a derivative equal to zero almost everywhere. Singular random signals can be obtained at the output of some linear filters when the input is a discrete-valued white noise. Sufficient conditions for singularity are
openaire +2 more sources
Singularity development and supersymmetry in holography
Journal of High Energy Physics, 2017 We study the effects of supersymmetry on singularity development scenario in holography presented in [1] (BBL). We argue that the singularity persists in a supersymmetric extension of the BBL model. The challenge remains to find a string theory embedding
Alex Buchel
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A holographic kaleidoscope for N $$ \mathcal{N} $$ = 1*
Journal of High Energy Physics, 2019 We study in detail the recently-found family of asymptotically AdS5 × S 5 type IIB supergravity solutions dual to the N $$ \mathcal{N} $$ = 1* SYM theory with equal masses.
Nikolay Bobev +3 more
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Naked singularity, firewall, and Hawking radiation
Scientific Reports, 2017 Spacetime singularity has always been of interest since the proof of the Penrose-Hawking singularity theorem. Naked singularity naturally emerges from reasonable initial conditions in the collapsing process.
Hongsheng Zhang
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Gravitational Collapse and Singularity Removal in Rastall Theory
Advances in High Energy Physics, 2021 In the present work, we study spherically symmetric gravitational collapse of a homogeneous fluid in the framework of Rastall gravity. Considering a nonlinear equation of state (EoS) for the fluid profiles, we search for a class of nonsingular collapse ...
Ehsan Dorrani
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Gravitational perfect fluid collapse in Gauss–Bonnet gravity
European Physical Journal C: Particles and Fields, 2017 The Einstein Gauss–Bonnet theory of gravity is the low-energy limit of heterotic super-symmetric string theory. This paper deals with gravitational collapse of a perfect fluid in Einstein–Gauss–Bonnet gravity by considering the Lemaitre–Tolman–Bondi ...
G. Abbas, M. Tahir
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