Anisotropic evolution of 5D Friedmann-Robertson-Walker spacetime [PDF]
Physical Review D, 2011 We examine the time evolution of the five-dimensional Einstein field equations subjected to a flat, anisotropic Robertson-Walker metric, where the 3D and higher-dimensional scale factors are allowed to dynamically evolve at different rates. By adopting equations of state relating the 3D and higher-dimensional pressures to the density, we obtain an ...
Middleton, Chad A., Stanley, Ethan
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Uniqueness of self-similar asymptotically Friedmann-Robertson-Walker spacetime in Brans-Dicke theory [PDF]
Physical Review D, 2002 Revised version, 4 pages, no figures, Revtex, accepted for publication in Physical Review ...
Hideki Maeda, Kei-Ichi Maeda
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On Glassey’s conjecture for semilinear wave equations in Friedmann–Lemaître–Robertson–Walker spacetime [PDF]
Boundary Value Problems, 2021 Consider nonlinear wave equations in the spatially flat Friedmann–Lemaître–Robertson–Walker (FLRW) spacetimes. We show blow-up in finite time of solutions and upper bounds of the lifespan of blow-up solutions to give the FLRW spacetime version of Glassey’
Kimitoshi Tsutaya, Yuta Wakasugi
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On the integrability of the geodesic flow on a Friedmann–Robertson–Walker spacetime [PDF]
Physica Scripta, 2018 Abstract We study the geodesic flow on the cotangent bundle T
Francisco Astorga +2 more
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Shock waves in the Friedmann-Robertson-Walker spacetime [PDF]
Proceedings of The XIXth International Workshop on High Energy Physics and Quantum Field Theory — PoS(QFTHEP2010), 2011 Ekaterina Pozdeeva, Irina Arefeva
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Induced Brownian motion by the Friedmann–Robertson–Walker spacetime in the presence of a cosmic string [PDF]
The European Physical Journal Plus, 2020 In this paper, we investigate the quantum Brownian motion of a massive scalar point particle induced by the FRW spacetime in the presence of a linear topological defect named cosmic string. In addition, we also consider a flat boundary orthogonal to the defect to analyze its effect on the particle’s motion.
Herondy Francisco Santana Mota +1 more
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On heatlike lifespan of solutions of semilinear wave equations in Friedmann-Lemaître-Robertson-Walker spacetime [PDF]
Journal of Mathematical Analysis and Applications, 2021 Consider a nonlinear wave equation for a massless scalar field with self-interaction in the spatially flat Friedmann-Lemaitre-Robertson-Walker spacetimes. We treat the so-called heatlike case where the critical exponent is affected by the Fujita exponent.
Yuta Wakasugi, Kimitoshi Tsutaya
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Gravity-induced entanglement between two massive microscopic particles in curved spacetime: II. Friedmann–Lemaître–Robertson–Walker universe [PDF]
European Physical Journal C: Particles and Fields, 2023 In our previous work (Zhang and Shu in Eur Phys J. C 84(3):256, 2024), we have explored quantum gravity induced entanglement of masses (QGEM) in curved spacetime, observing entanglement formation between particles moving along geodesics in a ...
Chi Zhang, Fu-Wen Shu
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NONASSOCIATIVE GEOMETRY: FRIEDMANN–ROBERTSON–WALKER SPACETIME [PDF]
International Journal of Geometric Methods in Modern Physics, 2006 In (Phys. Rev. D62 (2000) 081501(R)) we proposed a unified description of continuum and discrete spacetime based on nonassociative geometry. It follows from our approach that at distances comparable with Planck length the standard concept of spacetime might be replaced by the nonassociative discrete structure, and nonassociativity is the algebraic ...
Alexander I Nesterov
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Effective dynamics of scalar perturbations in a flat Friedmann-Robertson-Walker spacetime in loop quantum cosmology [PDF]
Physical Review D, 2014 We study the evolution of a homogeneous and isotropic spacetime whose spatial sections have three-torus topology, coupled to a massless scalar field with small scalar perturbations within loop quantum cosmology. We consider a proposal for the effective dynamics based on a previous hybrid quantization completed by us.
Fernández Méndez, Mikel +2 more
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