Cosmological perturbations - Open Access .click

Results 151 to 160 of about 299,841 (224)

, 2015
This thesis is dedicated to the study of the cosmological perturbations in the inflationary universe. With the homogenous Robertson-Walker metric as our starting point, we introduce the primordial metric fluctuations which are classified as scalar, vector or tensor. Then, we introduce the gauge invariant variables and study the homogenous background of
openaire +1 more source

Does cosmological expansion affect local physics? [PDF]

, 2013
In this contribution I wish to address the question whether, and how, the global cosmological expansion influences local physics, like particle orbits and black hole geometries.
Domenico Giulini, Giulini, Domenico
core

The entropy of dynamical de Sitter horizons

European Physical Journal C: Particles and Fields
We propose a new formula for the entropy of a dynamical cosmological event horizon, which is valid to leading order for perturbations of a stationary asymptotically de Sitter spacetime.
Jinan Zhao
doaj +1 more source

Forecasts on the dark energy anisotropic stress for the esa euclid survey [PDF]

The cosmological constant Λ seems to be a not satisfactory explanation of the late-time accelerated expansion of the Universe, for which a number of experimental evidences exist; therefore, it has become necessary in the last years to consider ...
Fogli, Simone
core

The quintom theory of dark energy after DESI DR2. [PDF]

Natl Sci Rev
Cai Y, Ren X, Qiu T, Li M, Zhang X.
europepmc +1 more source

Finite-Capacity Thermodynamics of Causal Horizons. [PDF]

Entropy (Basel)
Antiba CA.
europepmc +1 more source

Holographic is Hamiltonian, relatively. [PDF]

Lett Math Phys
Chruściel PT, Wutte R.
europepmc +1 more source

Everyone wants something better than ΛCDM. [PDF]

Proc Natl Acad Sci U S A
Turner MS.
europepmc +1 more source

Screened axio-dilaton cosmology: novel forms of early dark energy. [PDF]