Bouncing cosmology
Webextended theories of gravity; bouncing cosmology; order reduction 1. Introduction The classical theory of Big Bang describes the beginning of the Universe as an initial singularity wherein the temperature and the density assume an infinite value. WebIn present study, bouncing cosmology in the context of theory of gravity is examined. For this purpose, a GB cosmological model with logarithmic trace term, i.e., , is considered. …
Bouncing cosmology
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WebJul 26, 2024 · Bouncing cosmology in f (R, G) gravity b y order reduction Bruno J. Barros, Els a M. T eixeira, and Daniele V ernieri Instituto de Astrof ´ ısica e Ciˆ enc ias do Espa¸ co, Facu ldade de Ciˆ ... WebBouncing Cosmology Rebounds🏀 Dr Brian Keating 103K subscribers Join Subscribe 836 20K views 1 year ago You probably think all cosmologists believe in the Big Bang. After all, there was a TV show...
WebAug 1, 2024 · A bouncing universe is a viable candidate to solve the initial singularity problem. Here we consider bouncing solutions in the context of gravity by using an order reduction technique which allows one to find solutions that are perturbatively close to General Relativity. This procedure also acts as a model selection approach. WebJan 10, 2024 · Bouncing models based on slow contraction and non-singular bounces require familiar elements: ordinary matter, dark matter, radiation, and a scalar field ϕ with potential V ( ϕ) that is coupled to itself and gravity and that evolves throughout according to classical equations of motion in the standard ( 3 + 1) dimensions.
WebJun 11, 2012 · The non-singular bouncing cosmology is an alternative paradigm to inflation, wherein the background energy density vanishes at the bounce point, in the context of Einstein gravity. WebThis paper is devoted to explore bouncing cosmology in f (T, 풯) modified gravity. In the background of f (T, 풯) modified theory with T being Torsion scalar and 풯 being the trace of energy–momentum tensor, the Hubble parameter is considered for the isotropic, flat, and homogenous universe. The standard bouncing scale factor has employed the …
Webextended theories of gravity; bouncing cosmology; order reduction 1. Introduction The classical theory of Big Bang describes the beginning of the Universe as an initial …
WebA bouncing cosmology is an alternative to inflation that can produce a curvature power spectrum that is scale invariant and the bouncing scenario leads to non-singular universe evolution [92–102]. In the scenario of matter bouncing, the universe experiences a matter-dominated period with the onset of the contraction. gravity homes ferrisWebA nonsingular bouncing cosmology can be achieved by introducing a fermion field with BCS condensation occurring at high energy scales. In this paper we are able to dilute the anisotropic stress near the bounce by means… gravity homes cleburneWebKaluza-Klein cosmological model has been obtained in the general theory of relativity. The source for energy-momentum tensor is assumed a perfect fluid. The field equations have been solved by using gravity holt michiganWebthan the time scale of the bouncing phase, both the amplitude and the shape of the power spectrum of primordial curvature pertur-bations can remain unchanged through the bouncing point due to a no-go theorem [36,37]. A challenge that the matter bounce cosmology has to address is how to obtain a slightly red tilt on gravity homes dallas txWebBouncing Cosmology made simple arXiv:1803.01961 Abstract. We introduce the "wedge diagram," an intuitive way to illustrate how cosmological models with a classical (non … gravity holds planets in orbitWebFeb 15, 2024 · As is evident from Fig. 2, in bouncing cosmologies scales of cosmological interest originate on sub-Hubble scales at early times in the contracting phase, in the … chocolate chip cookie recipe joyfoodsunWebHis research spans problems in particle physics, astrophysics, cosmology, condensed matter physics and geophysics. He is one of the architects of the inflationary theory. More recently, he proposed the "ekpyrotic model" of … chocolate chip cookie recipe high altitude