cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: Λ), alternatively called Einstein's cosmological constant,...

quantum field theory? More unsolved problems in physics In cosmology, the cosmological constant problem or vacuum catastrophe is the substantial disagreement...

Tμν is the stress–energy tensor, Λ is the cosmological constant and κ is the Einstein gravitational constant. The Einstein tensor is defined as G μ ν =...

Hubble for providing the observational basis for modern cosmology. The cosmological constant has regained attention in recent decades as a hypothetical...

equations, R(t) is the cosmological scale factor, G {\displaystyle G} is the Newtonian constant of gravitation, Λ is the cosmological constant with dimension...

mathematical model of the Big Bang theory with three major components: a cosmological constant, denoted by lambda (Λ), associated with dark energy; the postulated...

physical cosmology, current observations in favor of an accelerating universe imply the existence of a tiny, but nonzero cosmological constant. This problem...

value}}{\text{theoretical value}}}} Examples include Einstein's cosmological constant, dark energy, the initial proposals of dark matter and inflation...

Physical cosmology is a branch of cosmology concerned with the study of cosmological models. A cosmological model, or simply cosmology, provides a description...

homogeneity and isotropy of space. A version of the model with a cosmological constant (Lambda) and cold dark matter, known as the Lambda-CDM model, is...

gravitational dynamics. For photons, expansion leads to the cosmological redshift. While the cosmological redshift is often explained as the stretching of photon...

non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in...

Subsequent modelling of the universe explored the possibility that the cosmological constant, introduced by Einstein in his 1917 paper, may result in an expanding...

in addressing the so-called cosmological constant problem. One of the earliest documented attempts to apply brane cosmology as part of a conceptual theory...

sense of quantum field theories. In cosmology, the vacuum energy is one possible explanation for the cosmological constant and the source of dark energy. Scientists...

effect, cosmological coupling and shockwave cosmology (see the section § Alternatives to dark energy). The "cosmological constant" is a constant term that...

FLRW cosmology can predict whether the expansion will eventually stop based on the average energy density, Hubble parameter, and cosmological constant. If...

electric charge. Lemaître also argued in favor of including a positive cosmological constant in the Einstein field equations, both for conceptual reasons and...

The cosmological constant, which can be thought of as the density of dark energy in the universe, is a fundamental constant in physical cosmology that...

"Sinks in the landscape, Boltzmann brains and the cosmological constant problem". Journal of Cosmology and Astroparticle Physics. 2007 (1): 022. arXiv:hep-th/0611043...

In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the very early universe...

positive sign of the cosmological constant, which is the case according to the currently accepted value of the cosmological constant, Λ, that is approximately...

the Einstein tensor (not the gravitational constant despite the use of G), Λ is the cosmological constant, gμν is the metric tensor, Tμν is the stress–energy...

study based on the observation of methanol in a distant galaxy. The cosmological constant is a measure of the energy density of the vacuum. It was first measured...

a steady-state universe, Einstein added what was later called a cosmological constant to his equations. Einstein's model of a static universe was proved...

anisotropic? More unsolved problems in physics An inhomogeneous cosmology is a physical cosmological theory (an astronomical model of the physical universe's...

Einstein himself considered the introduction of the cosmological constant in his 1917 paper founding cosmology as a "blunder". The theory of general relativity...

ordinary matter, so the dynamics of the universe are dominated by the cosmological constant, thought to correspond to dark energy in our universe or the inflaton...

physics, physical models for dark energy do not match cosmological data, and some cosmological observations are inconsistent. These issues have led to...

contributed by a cosmological constant. Steven Weinberg gave an anthropic explanation for this fact: he noted that the cosmological constant has a remarkably...