Inverse curvature flows in asymptotically Robertson Walker spaces
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Differential Equations"
DOI: 10.1016/j.jde.2017.12.019
Abstract: Abstract In this paper we consider inverse curvature flows in a Lorentzian manifold N which is the topological product of the real numbers with a closed Riemannian manifold and equipped with a Lorentzian metric having… read more here.
Keywords: asymptotically robertson; curvature flows; robertson walker; inverse curvature ... 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
Asymptotic-stability of the inhomogeneous Boltzmann equation in the Robertson–Walker space–time with Israel particles
Sign Up to like & getrecommendations! Published in 2020 at "Applicable Analysis"
DOI: 10.1080/00036811.2018.1522628
Abstract: ABSTRACT In this paper, we consider the Cauchy problem for the spatially inhomogeneous relativistic Boltzmann equation where the collision kernel is generated by Israel particle. Unique global (in time) classical solution is obtained in a… read more here.
Keywords: space; space time; time; boltzmann equation ... See more keywords
Casimir effect for parallel plates in a Friedmann-Robertson-Walker universe
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DOI: 10.1103/physrevd.95.065024
Abstract: We evaluate the Hadamard function, the vacuum expectation values (VEVs) of the field squared and the energy-momentum tensor for a massive scalar field with general curvature coupling parameter in the geometry of two parallel plates… read more here.
Keywords: geometry; friedmann robertson; parallel plates; robertson walker ... See more keywords
Hadronic Matter in the Robertson–Walker Metric and the Early Universe
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DOI: 10.1134/s1547477119030075
Abstract: In this work, the Friedman equations for hadronic matter in the Robertson-Walker metric in the early Universe are obtained. We consider the hadronic phase, formed after the hadronization of the quark-gluon plasma, that means times… read more here.
Keywords: matter robertson; metric early; walker metric; robertson walker ... See more keywords
Casimir effect and Stefan–Boltzmann law at finite temperature in a Friedmann–Robertson–Walker universe
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Modern Physics D"
DOI: 10.1142/s0218271820500455
Abstract: A spatially flat Friedmann-Robertson-Walker background with a general scale factor is considered. In this space-time, the energy-momentum tensor of the scalar field with a general curvature coupling parameter is obtained. Using the Thermo Field Dynamics… read more here.
Keywords: temperature; casimir effect; friedmann robertson; effect ... See more keywords
On Glassey’s conjecture for semilinear wave equations in Friedmann–Lemaître–Robertson–Walker spacetime
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DOI: 10.1186/s13661-021-01571-0
Abstract: 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… read more here.
Keywords: tre robertson; friedmann lema; robertson walker; glassey conjecture ... See more keywords