WebFeb 28, 2024 · We describe and demonstrate the potential of a new and very efficient method for simulating certain classes of modified gravity theories, such as the widely studied f(R) gravity models.High resolution simulations for such models are currently very slow due to the highly nonlinear partial differential equation that needs to be solved … WebJun 26, 2014 · For theories that screen via the first method described above (chameleon-like screening), there have been studies of f (R) gravity Llinares et al. 2014;Puchwein et al. 2013;Zhao et al....
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WebNov 19, 2008 · We analyze f (R) modifications of Einstein’s gravity as dark energy models in the light of their connection with chameleon theories. Formulated as scalar-tensor … WebFeb 10, 2024 · There exists another significant difference between Palatini f ( R) gravity and the chameleon theory: Since the fifth force is produced by the gradient of the scalar field, and in chameleon theories a compact object in a homogeneous background can generate a scalar field with Yukawa profile. homes for rent in thomaston
Speeding up N -body simulations of modified gravity: chameleon ...
Webits amplitude. Chameleon theories [11, 12], with f(R) grav-ity [13] (see also [14–16]) as a representative example, is an instance of the former case, while the dilaton [20] and sym-metron [21] models belong to the latter case. Amongst these models, f(R) gravity is currently the most well-studied case, WebDec 28, 2024 · New corrections to General Relativity are considered in the context of modified f(R) gravity, that satisfy cosmological and local gravity constraints. The … WebMar 20, 2024 · We consider the Cannex (Casimir And Non-Newtonian force EXperiment) test of the quantum vacuum intended for measuring the gradient of the Casimir pressure between two flat parallel plates at large separations and constraining parameters of the chameleon model of dark energy in cosmology. A modification of the measurement … homes for rent in thomasville ga