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pro vyhledávání: '"WAINWRIGHT, JOHN"'
Tracking quintessence, in a spatially flat and isotropic space-time with a minimally coupled canonical scalar field and an asymptotically inverse power-law potential $V(\varphi)\propto\varphi^{-p}$, $p>0$, as $\varphi\rightarrow0$, is investigated. T
Externí odkaz:
http://arxiv.org/abs/2311.16775
We use dynamical systems methods to study quintessence models in a spatially flat and isotropic spacetime with matter and a scalar field with potentials for which $\lambda(\varphi)=-V_{,\varphi}/V$ is bounded, thereby going beyond the exponential pot
Externí odkaz:
http://arxiv.org/abs/2209.09684
Publikováno v:
In Physics of the Dark Universe May 2024 44
Autor:
Voutsa, Venetia, Battaglia, Demian, Bracken, Louise J., Brovelli, Andrea, Costescu, Julia, Munoz, Mario Diaz, Fath, Brian D., Funk, Andrea, Guirro, Mel, Hein, Thomas, Kerschner, Christian, Kimmich, Christian, Lima, Vinicius, Messe, Arnaud, Parsons, Anthony J., Perez, John, Pöppl, Ronald, Prell, Christina, Recinos, Sonia, Shi, Yanhua, Tiwari, Shubham, Turnbull, Laura, Wainwright, John, Waxenecker, Harald, Hütt, Marc-Thorsten
The relationship of network structure and dynamics is one of most extensively investigated problems in the theory of complex systems of the last years. Understanding this relationship is of relevance to a range of disciplines -- from Neuroscience to
Externí odkaz:
http://arxiv.org/abs/2106.03523
We derive a new \emph{regular} dynamical system on a 3-dimensional \emph{compact} state space describing linear scalar perturbations of spatially flat Robertson-Walker geometries for relativistic models with a minimally coupled scalar field with an e
Externí odkaz:
http://arxiv.org/abs/2006.00800
Akademický článek
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Akademický článek
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The observational success and simplicity of the $\Lambda$CDM model, and the explicit analytic perturbations thereof, set the standard for any alternative cosmology. It therefore serves as a comparison ground and as a test case for methods which can b
Externí odkaz:
http://arxiv.org/abs/1904.02463
Autor:
Uggla, Claes, Wainwright, John
In this paper we consider second order perturbations of a flat Friedmann-Lema\^{i}tre universe whose stress-energy content is a single minimally coupled scalar field with an arbitrary potential. We derive the general solution of the perturbed Einstei
Externí odkaz:
http://arxiv.org/abs/1903.01846