A brief history of the multiverse

@article{Linde2017ABH,
  title={A brief history of the multiverse},
  author={Andrei Linde},
  journal={Reports on Progress in Physics},
  year={2017},
  volume={80}
}
  • Andrei Linde
  • Published 3 December 2015
  • Physics
  • Reports on Progress in Physics
The theory of the inflationary multiverse changes the way we think about our place in the world. According to its most popular version, our world may consist of infinitely many exponentially large parts, exhibiting different sets of low-energy laws of physics. Since these parts are extremely large, the interior of each of them behaves as if it were a separate universe, practically unaffected by the rest of the world. This picture, combined with the theory of eternal inflation and anthropic… 

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References

SHOWING 1-10 OF 146 REFERENCES

The inflationary Universe

According to the inflationary Universe scenario the Universe in the very early stages of its evolution was exponentially expanding in the unstable vacuumlike state. At the end of the exponential

The Global Structure of the Inflationary Universe

In this article we give a review of recent results concerning the global structure of the inflationary universe, which have been obtained within stochastic approach to inflation. It is shown in

The Cosmological Constant Problem, Dark Energy, and the Landscape of String Theory

In this colloquium-level account, I describe the cosmological constant problem: why is the energy of empty space at least 60 orders of magnitude smaller than several known contributions to it from

From the big bang theory to the theory of a stationary universe.

TLDR
It is shown that under certain conditions this process of the self-reproduction of the Universe can be described by a stationary distribution of probability, which means that the fraction of the physical volume of theiverse in a state with given properties does not depend on time, both at the stage of inflation and after it.

Many Worlds in One

A generic prediction of inflation is that the thermalized region we inhabit is spatially infinite. Thus, it contains an infinite number of regions of the same size as our observable universe, which

Fluctuations of the gravitational constant in the inflationary Brans-Dicke cosmology.

TLDR
It is found that in some inflationary models the probability distribution P_p rapidly approaches a stationary regime, and the shape of the distribution depends, however, on the choice of the time parametrization.

Uncertainties of predictions in models of eternal inflation.

TLDR
It is shown, both analytically and numerically, that the variation of the results due to a factor ordering ambiguity inherent in the model is of the same order as their variation due to the choice of the time variable.

Eternally Existing Self-Reproducing Inflationary Universe

It is shown that the large-scale quantum fluctuations of the scalar field generated in the chaotic inflation scenario lead to an infinite process of self-reproduction of inflationary mini-universes.

Predictability crisis in inflationary cosmology and its resolution

Models of inflationary cosmology can lead to variation of observable parameters ("constants of Nature") on extremely large scales. The question of making probabilistic predictions for today's
...