Cosmological space-times with resolved Big Bang in Yang-Mills matrix models
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2018)033
Abstract: A bstractWe present simple solutions of IKKT-type matrix models that can be viewed as quantized homogeneous and isotropic cosmological space-times, with finite density of microstates and a regular Big Bang (BB). The BB arises from… read more here.
Keywords: matrix models; big bang; space; cosmological space ... See more keywords
On the uniqueness of a shear-vorticity-acceleration-free velocity field in space-times
Sign Up to like & getrecommendations! Published in 2019 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-019-2607-1
Abstract: AbstractWe prove that in space-times a velocity field that is shear, vorticity and acceleration-free, if any, is unique up to reflection, with these exceptions: generalized Robertson-Walker space-times whose space sub-manifold is warped, and twisted space-times… read more here.
Keywords: velocity field; shear vorticity; space; space times ... See more keywords
Non-singular space-times with a negative cosmological constant: II. Static solutions of the Einstein–Maxwell equations
Sign Up to like & getrecommendations! Published in 2017 at "Letters in Mathematical Physics"
DOI: 10.1007/s11005-017-0955-x
Abstract: We construct infinite-dimensional families of non-singular static space-times, solutions of the vacuum Einstein–Maxwell equations with a negative cosmological constant. The families include an infinite-dimensional family of solutions with the usual AdS conformal structure at conformal… read more here.
Keywords: cosmological constant; negative cosmological; einstein maxwell; maxwell equations ... See more keywords
Non-singular coordinates of some Kiselev space-times
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Astrophysics and Astronomy"
DOI: 10.1007/s12036-018-9562-1
Abstract: In this article, non-singular Kruskal-like coordinates of some Kiselev space-times are presented. Also, non-singular Carter-like coordinates are constructed for the extreme case of Kiselev space-time. read more here.
Keywords: coordinates kiselev; singular coordinates; kiselev space; space times ... See more keywords
The space-times of migration and debt: Re-positioning migrants’ debt and credit practices and institutions in, and through, London
Sign Up to like & getrecommendations! Published in 2019 at "Geoforum"
DOI: 10.1016/j.geoforum.2018.07.009
Abstract: Abstract This paper interrogates the space-times of migration and debt in, and through, the global city of London. It advances three key arguments. First, we argue that migration must be understood as a financial practice… read more here.
Keywords: space times; debt; migrants debt; migration debt ... See more keywords
On cosmological constant of generalized Robertson-Walker space-times
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Mathematical Physics"
DOI: 10.1063/1.4983134
Abstract: We classify (m + n)D warped product spaces (M¯,g¯) satisfying Einstein’s equation G¯=−Λ¯g¯. We show that the warping function f can determine not only the cosmological constant Λ¯ but also the cosmological constant Λ appearing… read more here.
Keywords: cosmological constant; generalized robertson; walker space; robertson walker ... See more keywords
The wave equation in Friedmann-Robertson-Walker space-times and asymptotics of the intensity and distance relationship of a localised source
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Mathematical Physics"
DOI: 10.1063/1.5022052
Abstract: Variations in redshift measurements of Type 1a supernovae and intensity observations from large sky surveys are an indicator of a component of acceleration in the rate of expansion of space-time. A key factor in the… read more here.
Keywords: intensity distance; space; time; space times ... See more keywords
De Sitter space-times in entangled relativity
Sign Up to like & getrecommendations! Published in 2020 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac0589
Abstract: It is argued that de Sitter space-times might be solutions of entangled relativity once the quantum trace anomaly from matter fields in curved space-times is taken into account. This hypothesis would be an elegant solution… read more here.
Keywords: entangled relativity; times entangled; sitter space; space times ... See more keywords
Evolutions of Gowdy, Brill, and Teukolsky initial data on a smooth lattice
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DOI: 10.1103/physrevd.96.024037
Abstract: Numerical results, based on a lattice method for computational general relativity, will be presented for Cauchy evolution of initial data for the Brill, Teukolsky and polarised Gowdy space-times. The simple objective of this paper is… read more here.
Keywords: brill teukolsky; lattice method; space times; brill ... See more keywords
Spectral asymptotics on stationary space-times
Sign Up to like & getrecommendations! Published in 2020 at "Reviews in Mathematical Physics"
DOI: 10.1142/s0129055x20600077
Abstract: We review our recent relativistic generalization of the Gutzwiller–Duistermaat–Guillemin trace formula and Weyl law on globally hyperbolic stationary space-times with compact Cauchy hypersurfaces. ... read more here.
Keywords: stationary space; asymptotics stationary; space times; spectral asymptotics ... See more keywords
A note on classification of locally rotationally symmetric Bianchi type I space–times via conformal vector fields in f(T,B) gravity
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887821501231
Abstract: The aim of this paper is to classify locally rotationally symmetric (LRS) Bianchi type I space-times via conformal vector fields (CVFs) in the [Formula: see text] gravity. In a first step, we find the space-times… read more here.
Keywords: space times; vector fields; gravity; times via ... See more keywords