The Cosmological Constant from the Viewpoint of String Theory

By E. Witten. 2000

239 citations recorded by the source corpus.

The mystery of the cosmological constant is probably the most pressing obstacle to significantly improving the models of elementary particle physics derived from string theory. The problem arises because in the standard framework of low energy physics, there appears to be no natural explanation for vanishing or extreme smallness of the vacuum energy, while on the other hand it is very difficult to modify this framework in a sensible way. In seeking to resolve this problem, one naturally wonders if the real world can somehow be interpreted in terms of a vacuum state with unbroken supersymmetry.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/08305b632b327a1544f7db086ab66fb12683f51d

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Citations in the corpus

The scaling evolution of cosmological constant (2000, background): “One of them supposes that there is some hidden symmetry which makes CC exactly zero, for instance, at the zero energy scale [7] 7.”
Cosmological constant and vacuum energy: old and new ideas (2013, background): “However, the scientific community did make a big hype about the old CC problem [6, 7, 8], see also [107], and we should not go too fast and jump to conclusions.”
Constraints on holographic dark energy from the latest supernovae, galaxy clustering, and cosmic microwave background anisotropy observations (2007, background): “Actually, the dark energy problem may be in principle a problem belongs to quantum gravity domain [35].”
Categorizing Different Approaches to the Cosmological Constant Problem (2004, background): “However, as he also argues in the same article, in 2 + 1 dimensions, this unsatisfactory dichotomy does not arise: SUSY can explain the vanishing of the CC without leading to equality of boson and fermion masses, see also [16].”