Search
Search Results
-
A new solution for a generalized cosmological wormhole
We find a new exact solution to Einstein field equations that represents a cosmological wormhole embedded in a flat...
-
A constructive solution to the cosmological bootstrap
In this paper we revisit a generalised crossing equation that follows from harmonic analysis on the conformal group, and is of particular interest...
-
Nonlocal de Sitter gravity and its exact cosmological solutions
This paper is devoted to a simple nonlocal de Sitter gravity model and its exact vacuum cosmological solutions. In the Einstein-Hilbert action with Λ...
-
Cosmological correlators with double massive exchanges: bootstrap equation and phenomenology
Using the recently developed cosmological bootstrap method, we compute the exact analytical solution for the seed integral appearing in cosmological...
-
Similarity of cosmological models and its application to the analysis of cosmological evolution
AbstractScale transformations of cosmological models based on a statistical system of degenerate fermions with a scalar Higgs interaction are...
-
Gravitational decoupled interior solutions from Kohler–Chao–Tikekar cosmological model
This paper is devoted to obtaining and studying two interior exact solutions of Einstein’s Field Equations (EFE) for spherical geometry in the...
-
Exact cosmological models in metric-affine F(R, T) gravity
A flat Friedmann–Lematre–Robertson–Walker (FLRW) spacetime metric was used to investigate some exact cosmological models in metric-affine F ( R , T )...
-
The exact WKB and the Landau-Zener transition for asymmetry in cosmological particle production
Cosmological particle production by a time-dependent scalar field is common in cosmology. We focus on the mechanism of asymmetry production when...
-
Exact solution of Bardeen black hole in Einstein–Gauss–Bonnet gravity
We have obtained a new exact regular black hole solution for the EGB gravity coupled with nonlinear electrodynamics in AdS space. The numerical...
-
The Brans–Dicke field in non-metricity gravity: cosmological solutions and conformal transformations
We consider the Brans–Dicke theory in non-metricity gravity, which belongs to the family of symmetric teleparallel scalar–tensor theories. Our focus...
-
The cosmological ultra-low frequency radio background: a solution to the Hubble tension and the 21-cm excess trough
Recent observations of the Cosmic Microwave Background and the Hubble Space Telescope obtain two different values of the Hubble constant with a...
-
Positivity from Cosmological Correlators
Effective field theories in flat space and in anti-de Sitter space are constrained by causality and unitarity, often in the form of positivity...
-
Cosmological Evolution with Negative Energy Densities
For general number of spatial dimensions we investigate the cosmological dynamics driven by a cosmological constant and by a source with barotropic...
-
Lectures on the Theory of Cosmological Perturbations
The theory of cosmological perturbations has become a cornerstone of modern quantitative cosmology since it is the framework which provides the link...
-
-
Cosmological bootstrap in slow motion
Speed matters. How the masses and spins of new particles active during inflation can be read off from the statistical properties of primordial...
-
The exact WKB for cosmological particle production
The Bogoliubov transformation in cosmological particle production can be explained by the Stokes phenomena of the corresponding ordinary differential...
-
Cosmological Applications of Loop Quantum Gravity
After a brief introduction to classical and quantum gravity we discuss applications of loop quantum gravity in the cosmological realm. This includes...
-
