An obstacle to creating a universe in the laboratory

  title={An obstacle to creating a universe in the laboratory},
  author={Edward Farhi and Alan Harvey Guth},
  journal={Physics Letters B},


We study the problem of a 1 + 1 cord with a dynamical massless scalar field living in it, which separates a false vacuum and a conical region in a 2 + 1 space. A stable "particle-like" configuration

Can a man-made Universe be created by quantum tunneling without an initial singularity?

Essentially all modern particle theories suggest the possible existence of a false vacuum state – a metastable state with an energy density that cannot be lowered except by means of a very slow phase

M theory observables for cosmological space-times

We discuss the construction of the analog of an S-matrix for space-times that begin with a Big-Bang and asymptote to an FRW universe with nonnegative cosmological constant. When the cosmological

Vacuum bubble in an inhomogeneous cosmology

We study the propagation of bubbles of new vacuum in a radially inhomogeneous Lemaitre-Tolman-Bondi background that includes a cosmological constant. This exemplifies the classical evolution of a

Consistent Cosmic Bubble Embeddings

The Raychaudhuri equation for null rays is a powerful tool for finding consistent embeddings of cosmological bubbles into a background spacetime in a way that is largely independent of the matter

Observers in an accelerated universe

If the current acceleration of our Universe is due to a cosmological constant, then a Coleman–De Luccia bubble will nucleate in our Universe. In this work, we consider that our observations could be

TASI Lectures on the cosmological constant

The energy density of the vacuum, Lambda, 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



Evolution of perturbations in an inflationary universe

We analyze the evolution of inhomogeneous density perturbations in a model of the very early universe that is dominated for a time by a constant energy density of a false quantum-mechanical vacuum,

Gravitational collapse and spacetime singularities

accompanied by a violent release of energy, possible in the form of gravitational radiation. The detailed mathematical discussion of such situations is difficult since the full complexity of general

Compactness Criterion for the Formation of Averaged Trapped Surfaces in Gravitational Collapse

S>An average trapped surface is defined as a closed two-surface with the property that the area of the wave fronts forined by light rays emitted in the orthogonal inward and outward directions are

Abundance of Primordial Holes Produced by Cosmological First-Order Phase Transition

One important prediction of a cosmological model based on grand unified theories is the production of primordial black holes and wormholes through a first· order phase transition. In this paper we