Results 71 to 80 of about 58,534 (245)
Cosmological Perturbations in Phantom Dark Energy Models
Universe, 2017 The ΛCDM paradigm, characterised by a constant equation of state w = − 1 for dark energy, is the model that better fits observations. However, the same observations strongly support the possibility of a dark energy content where the corresponding
Imanol Albarran +2 more
doaj +1 more source
Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model
Systems Research and Behavioral Science, EarlyView.ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley +1 more source
Cosmological influence of super-Hubble perturbations
, 2005 The existence of cosmological perturbations of wavelength larger than the Hubble radius is a generic prediction of the inflationary paradigm. We provide the derivation beyond perturbation theory of a conserved quantity which generalizes the linear ...
Kolb, Edward W. +3 more
core +1 more source
Entanglement Entropy of Cosmological Perturbations
, 2020 We show that the entropy of cosmological perturbations originating as quantum vacuum fluctuations in the very early universe, including the contribution of the leading nonlinear interactions, can be viewed as momentum space entanglement entropy between ...
Alaryani, Omar +2 more
core +1 more source
TESOL Quarterly, EarlyView.Abstract This article reports on a qualitative study of the way instructors and students understand and respond to traumatizing events in a Sri Lankan university. It shows how the attitudes and practices in the society at large are carried over to classrooms even though local institutions do not have a programmatic trauma‐informed pedagogy.
Suresh Canagarajah +1 more
wiley +1 more source
Cosmological perturbations from five-dimensional inflation
Journal of High Energy PhysicsIt was recently proposed that five-dimensional inflation can relate the causal size of the observable universe to the present weakness of gravitational interactions by blowing up an extra compact dimension from the microscopic fundamental length of ...
Ignatios Antoniadis +2 more
doaj +1 more source
On the effect of renormalization group improvement on the cosmological power spectrum
European Physical Journal C: Particles and Fields, 2018 Asymptotically safe quantum gravity predicts running gravitational and cosmological constants, while it remains a meaningful quantum field theory because of the existence of a finite number of non-Gaussian ultraviolet fixed points.
R. Moti, A. Shojai
doaj +1 more source
Irregular universe in the Nieh-Yan modified teleparallel gravity
Physics Letters B, 2023 The Nieh-Yan modified teleparallel gravity is a model which modifies the general relativity equivalent teleparallel gravity by a coupling between the Nieh-Yan density and an axion-like field.
Mingzhe Li, Haomin Rao
doaj +1 more source
A time varying speed of light as a solution to cosmological puzzles [PDF]
, 1999 We consider the cosmological implications of light travelling faster in the early Universe. We propose a prescription for deriving corrections to the cosmological evolution equations while the speed of light $c$ is changing. We then show how the horizon,
A. Albrecht +30 more
core +2 more sources
Matter perturbations in scaling cosmology [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 A suitable nonlinear interaction between dark matter with an energy density $ _{M}$ and dark energy with an energy density $ _{X}$ is known to give rise to a non-canonical scaling $ _{M} \propto _{X}a^{- }$ where $ $ is a parameter which generally deviates from $ =3$.
Fuño, A. Romero +2 more
openaire +2 more sources