Sinks in the landscape, Boltzmann brains and the cosmological constant problem

@article{Linde2007SinksIT,
  title={Sinks in the landscape, Boltzmann brains and the cosmological constant problem},
  author={Andrei Linde},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2007},
  volume={2007},
  pages={022-022}
}
  • Andrei Linde
  • Published 2007
  • Physics
  • Journal of Cosmology and Astroparticle Physics
This paper extends a recent investigation of the string theory landscape (Ceresole et al 2006 Phys. Rev. D 74 086010), where it was found that the decay rate of de Sitter (dS) vacua to a collapsing space with a negative vacuum energy can be quite large. The parts of space that experience a decay to a collapsing space, or to a Minkowski vacuum, never return back to dS space. The channels of irreversible vacuum decay serve as sinks for the probability flow. The existence of such sinks is a… Expand

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References

SHOWING 1-10 OF 135 REFERENCES
Taming the Runaway Problem of Inflationary Landscapes
A wide variety of vacua, and their cosmological realization, may provide an explanation for the apparently anthropic choices of some parameters of particle physics and cosmology. If the probabilityExpand
Domain walls, near-BPS bubbles, and probabilities in the landscape
We develop a theory of static BPS domain walls in stringy landscape and present a large family of BPS walls interpolating between different supersymmetric vacua. Examples include KKLT models, STUExpand
Probabilities in the landscape: The decay of nearly flat space
We discuss aspects of the problem of assigning probabilities in eternal inflation. In particular, we investigate a recent suggestion that the lowest energy de Sitter vacuum in the landscape isExpand
Density perturbations and the cosmological constant from inflationary landscapes
An anthropic understanding of the cosmological constant requires that the vacuum energy at late time scans from one patch of the universe to another. If the vacuum energy during inflation also scans,Expand
Cosmological constant and the time of its dominance
We explore a model in which the cosmological constant L and the density contrast at the time of recombination s rec are random variables, whose range and a priori probabilities are determined by theExpand
Predictions from quantum cosmology.
  • Vilenkin
  • Physics, Medicine
  • Physical review letters
  • 1995
TLDR
The picture that has emerged from this line of development is that a small closed universe can spontaneously nucleate out of nothing, where by ‘nothing’ I mean a state with no classical space and time. Expand
Stationary solutions in Brans-Dicke stochastic inflationary cosmology.
TLDR
It is shown here that a nonminimal conformal coupling of the inflaton to the curvature scalar, as well as radiative corrections to the effective potential, may provide a dynamical cutoff and generate stationary solutions for chaotic inflation potentials. Expand
Likely Values of the Cosmological Constant
In theories in which the cosmological constant takes a variety of values in different "subuniverses," the probability distribution of its observed values is conditioned by the requirement that thereExpand
What does inflation really predict
If the inflaton potential has multiple minima, as may be expected in, e.g., the string theory 'landscape', inflation predicts a probability distribution for the cosmological parameters describingExpand
Solutions to the cosmological constant problems
We critically review several recent approaches to solving the two cosmological constant problems. The "old" problem is the discrepancy between the observed value of $\Lambda$ and the large valuesExpand
...
1
2
3
4
5
...