Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Loo, Tee How"'
Within the context of metric-affine gravity, we examine the significance of the boundary term in symmetric teleparallel gravity by employing the cosmological dynamical system analysis method. We focus on the novel gravity models characterized by the
Externí odkaz:
http://arxiv.org/abs/2406.13189
We formulate $f(Q,C)$ gravity and cosmology. Such a construction is based on the symmetric teleparallel geometry, but apart form the non-metricity scalar $Q$ we incorporate in the Lagrangian the boundary term $C$ of its difference form the standard L
Externí odkaz:
http://arxiv.org/abs/2308.00652
We investigate the cosmological implications of $f(Q)$ gravity, which is a modified theory of gravity based on non-metricity, in non-flat geometry. We perform a detailed dynamical-system analysis keeping the $f(Q)$ function completely arbitrary. As w
Externí odkaz:
http://arxiv.org/abs/2306.13324
Publikováno v:
Physics of the Dark Universe Volume 41, August 2023, 101243
In this exclusive study of the modified $f(Q)$ theory of gravity in the open and closed type Friedmann-Lema\^itre-Robertson-Walker (FLRW) universe model, we impose some constraints from the classical energy conditions. The viable range of parameter $
Externí odkaz:
http://arxiv.org/abs/2304.05031
The vanishing affine connections have been used solely while adopting the modified $f(Q)$ gravity theory to the cosmology. Consequently, researchers could not get beyond what is already known in $f(T)$ theory earlier. To alleviate this problem, in th
Externí odkaz:
http://arxiv.org/abs/2304.02949
Publikováno v:
Fortschritte der Physik, Volume71, Issue8-9, September 2023, 2300038
In this study of the modified $f(Q)$ theory of gravity in the spatially flat Friedmann-Lema\^itre-Robertson-Walker (FLRW) spacetime, we explore all the affine connections compatible with the symmetric teleparallel structure; three classes of such con
Externí odkaz:
http://arxiv.org/abs/2304.02300
$f(Q,T)$ theory of gravity is very recently proposed to incorporate within the action Lagrangian, the trace $T$ of the energy-momentum tensor along with the non-metricity scalar $Q$. The cosmological application of this theory in a spatially flat iso
Externí odkaz:
http://arxiv.org/abs/2303.10884
Publikováno v:
Eur. Phys. J. C 83(3) (2023) 261
In the present article we analyze the matter-geometry coupled $f(Q,T)$ theory of gravity. We offer the fully covariant formulation of the theory, with which we construct the correct energy balance equation and employ it to conduct a dynamical system
Externí odkaz:
http://arxiv.org/abs/2303.02661
Autor:
De, Avik, Loo, Tee-How
In general relativity, the contracted Bianchi identity makes the field equation compatible with the energy conservation, likewise in $f(R)$ theories of gravity. We show that this classical phenomenon is not guaranteed in the symmetric teleparallel th
Externí odkaz:
http://arxiv.org/abs/2212.08304
Publikováno v:
European Physical Journal C 82 (2022) 705
Theories of gravity are fundamentally a relation between matter and the geometric structure of the underlying spacetime. So once we put some additional restrictions on the spacetime geometry, the theory of gravity is bound to get the impact, irrespec
Externí odkaz:
http://arxiv.org/abs/2208.06754