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 …
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 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 …
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 …
Derivation of the formula for cosmological redshift
Jun 29, 2012 · I was hoping somebody could point me towards a derivation of the following formula for cosmological redshift: z = R(t0)/R(te)-1. Wikipedia just presents the formula as a fait accompli and …
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?
Deriving the Cosmological Constant - Physics Forums
Jan 22, 2018 · The forum discussion centers on the derivation of the Cosmological Constant (Λ) within the context of Einstein's field equations and the Friedmann equation. Participants explore various …