Download e-book for kindle: Universe or Multiverse? (2007)(en)(517s) by Bernard Carr

By Bernard Carr

ISBN-10: 0521140692

ISBN-13: 9780521140690

ISBN-10: 0521848415

ISBN-13: 9780521848411

Physicists argue from varied views for and opposed to the belief of the life of a number of universes.

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Additional info for Universe or Multiverse? (2007)(en)(517s)

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On the other hand, other physicists have always held a more positive opinion, so there has developed a polarization of attitudes towards the anthropic principle. This is illustrated by the following quotes. The first is from the protagonist Freeman Dyson [28]: I do not feel like an alien in this Universe. The more I examine the Universe and examine the details of its architecture, the more evidence I find that the Universe in some sense must have known we were coming. This might be contrasted with the view of the antagonist Heinz Pagels [29]: The influence of the anthropic principle on contemporary cosmological models has been sterile.

As usually happens with this sort of revolution, Einstein’s advance came with a retreat in another direction: the effort to construct a classical model of the electron was permanently abandoned. Instead, symmetry principles increasingly became the dominant foundation for physical theories. This tendency was accelerated after the advent of quantum mechanics in the 1920s, because the survival of symmetry principles in quantum theories imposes highly restrictive consistency conditions (existence of antiparticles, connection between spin and statistics, cancellation of infinities and anomalies) on physically acceptable theories.

Douglas, private communication. 2 Living in the multiverse 37 If most constants do not effectively scan, then why should anthropic arguments work for the vacuum energy and the electroweak breaking scale? ADK point out that, even if some constant has a relatively narrow distribution, anthropic arguments will still apply if the anthropically allowed range is even narrower and near a point around which the distribution is symmetric. ) This is the case, for instance, for the vacuum energy if the superpotential W is the sum of the superpotentials Wn for a large number of decoupled scalar fields, for each of which there is a separate broken R symmetry, so that the possible values of each Wn are equal and opposite.

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Universe or Multiverse? (2007)(en)(517s) by Bernard Carr

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