Is the Cosmological Constant Problem a ... - Physics Forums
Oct 29, 2022 · The discussion centers on the cosmological constant problem, highlighting the discrepancy between the observed small value of vacuum energy density and the theoretically …
How Does the Cosmological Constant Λ Define the Cosmic Scale of …
Jul 29, 2008 · The discussion centers on the cosmological constant Λ and its implications for the cosmic scale of space-time, specifically through the equation Λ = 1/L², where L represents the invariant …
The Units of the Cosmological Constant: eV^2 • Physics Forums
Jun 1, 2022 · I was referring to , the energy density of the cosmological constant. The first paper you cite in the OP is discussing the scale of the energy density, the others discuss the constant appearing in …
All About the Einstein Field Equations - Physics Forums
Feb 26, 2024 · Tiny Numbers, Big Effects: The cosmological constant () in the EFE, originally introduced by Einstein to allow for a static universe, is estimated at less than . It’s small but drives the …
Learn About the Friedmann Equation and the Cosmos
Dec 22, 2017 · The cosmological principle is fundamental to determining the geometry of the universe. For example, homogeneity and isotropy reduce the possible spaces that can exist due to symmetry.
How does the symbol Λ cosmological constant relate to Ω_Λ or ρ_Λ?
Jun 18, 2022 · The discussion clarifies the relationship between the cosmological constant (Λ) and the dark energy density (ρ_Λ), emphasizing that they represent the same physical concept expressed in …
Does the Cosmological Principle in any way underpin Big Bang Theory ...
Aug 25, 2023 · The Cosmological Principle, which asserts that the universe is homogeneous and isotropic, is fundamentally supported by observational data rather than assumptions. It plays a …
Schwarzschild metric, cosmological constant - Physics Forums
Oct 30, 2006 · The cosmological constant is a constant added to the Einstein-Hilbert action, so the question remains whether black hole solutions are possible with such a modification of the action.
Sigma_8 and n_s Cosmological Parameters - Physics Forums
Jan 20, 2016 · The discussion focuses on the cosmological parameters σ8 and n_s, which are critical in galaxy clustering studies. σ8 represents the amplitude of the matter power spectrum on a scale of 8 …
AdS4 Radius & Cosmological Constant: Is n Relevant?
Feb 9, 2013 · The AdS4 radius is related to the cosmological constant by . Is this true in any number of dimensions, or is there a generalised relation depending on number of dimensions n?