The cosmological constant
By R. Bousso. 2007
152 citations recorded by the source corpus.
The energy density of the vacuum, Λ, is at least 60 orders of magnitude smaller than several known contributions to it. Approaches to this problem are tightly constrained by data ranging from elementary observations to precision experiments. Absent overwhelming evidence to the contrary, dark energy can only be interpreted as vacuum energy, so the venerable assumption that Λ = 0 conflicts with observation. The possibility remains that Λ is fundamentally variable, though constant over large spacetime regions. This can explain the observed value, but only in a theory satisfying a number of restrictive kinematic and dynamical conditions. String theory offers a concrete realization through its landscape of metastable vacua.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ea8a96faa52ff9cfdf3fd7fd8b5ad3383a3a2aab
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In Astronomy and Astrophysics
- Pavel Kroupa
- P. Hopkins
- C. Weidner
- C. Conroy
- Matthew R. Bate
- Mark R. Krumholz
- Michela Mapelli
- P. V. van Dokkum
In Nuclear and High Energy Physics
Citations in the corpus
- The Dark Matter Crisis: Falsification of the Current Standard Model of Cosmology (2012, background): “Dark energy (DE, e.g. Bousso 2008; Amendola & Tsujikawa 2010; Bousso 2012; Afshordi 2012) had to be introduced into the cosmological model as a third auxiliary hypothesis (‘Hypothesis 3’) because the interpretation of flux and redshift data from type Ia supernovae, given Hypothesis 0–2, suggests…”