Many Worlds in One: The Search for Other Universes. Alex Vilenkin, Author. Hill & Wang $24 (p) ISBN Many Worlds in One has ratings and 20 reviews. John said: I’m not sure who is the better scientist, but in terms of the prose required to address thi. RENOWNED cosmologist Alex Vilenkin, who is director of the Tufts University Institute of Cosmology in Massachusetts is known for his theory.

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Of course, with significantly more theoretical progress that might change, as should always be the case. Not the most wonderful book on cosmology I ever read, but it was good enough.

Cosmic Variance

Hi, as a plot-inclined person, I would be soooo happy to see a graphical description of just one of the 19 parameters of the standard model as a function of any one of the possible needed cut-offs that allowed a mediocrity principle to work out… That would be a start. There are two false vacuum states; electroweak and grand unified vacuum, and both have more symmetry and less diversity world particles and their interactions. One problem with putting in a cutoff though, wor,ds that, even if you make the number of vacua finite, the distribution of them may be peaked near the cutoff lots more ways to put in fluxes at the maximal number of them.

By Mark Trodden September 9, 9: To this end Alex devotes a chapter to string theory and, in particular, to the idea of the landscape as an example of how many different vacua, with different values of the cosmological constant might arise.

This is then used to argue for an anthropic understanding of, for example, the cosmological constant. Feb 22, Lori rated it liked it. I will try to make the book easy to read and maximally entertaining, using the story of my personal quest as a backdrop for discussion mxny the scientific ideas. Linking it to the landscape is like tieing your boat to the Titanic. I thought I was reading ancient Greek.

First, it is a small book by the standards of popular cosmology writing; just over pages. It was at the time when Einstein had just developed his cosmological solution to the GR field equations and had introduced his cosmological constant to keep his model universe static.


Given our understanding of quantum wor,ds theory, and some assumptions allowing one to try woglds understand the effect that such fluctuations would have on the background space-time, eternal inflation seems like a reasonable aspect of many inflationary models. If such a possibility is predicted by a theory that is viable in all other ways, then one should take it seriously as long as it can be tested.

This is perhaps an extension of the Popperian dogma that the best theories are those which are most easily falsified, so wrong theories are the best, since they are the most easily falsified of all….

Many Worlds in One: The Search for Other Universes

Worldds an early epoch when the universe was in a state of false vacuum the matter density was insufficient to balance the universe in a static state, at this time repulsive gravity of the false vacuum may have prevailed leading the universe into a frenzied expansion with much of the space occupied by false vacuum. Once we have this model, the principle of mediocrity can be used to determine the probablility for us to live in one vacuum or other.

Many publishers and authors have misused this situation to their advantage to market a product that is a more a science fiction than a scientific reality. I was a little surprised by this, since it seems to me to be merely a plain statement of what science really means.

In the book, Vilenkin does an outstanding job at describing what a true vacuum is, a false vacuum, Negative vacuum, The Scalar Field, density perturbations, Inflationary Process and etc. Nov 26, Richard rated it liked it. Worlxs are his O-regions spatially infinite?

We estimate the frequency of an MSSM like gauge group with three generations to be one in a billion. Nice divulgative exposition of the research ideas and results of Alex Vilekin, with a clear and engaging writing style.

[gr-qc/] Many worlds in one

It is so much easier to be a crackpot, peter! The anthropically-favored value of the CC depends on the prior distribution of magnitude of density fluctuations. The we will have all the ingredients to develop a model of an eternally inflating universe with worlxs inside bubbles inside bubbles… Once we have this model, the principle of mediocrity can be used to determine the probablility for us to live in one vacuum or other.


They are all beyond our horizon, so how can we verify that they really vilen,in In the grand unified vacuum, all three types of particle interactions are unified, and electrons, neutrons and quarks are interchangeable. I will definitiely have a look. Almost exactly half of the book, with the exception of a brief discussion of the future of life in the expanding universe, is devoted to a description of the standard model of cosmology and its inflationary extension.

So, im could promote the philosphical aspects of this as an alternative to traditional religion.

Apr 21, Stefano rated it really liked it Shelves: During inflation, two rival worls were occurring; false vacuum decay characterized by a half-life, and false vacuum-space-multiplication expansion characterized by its doubling time. Return to Book Page. July 4, at 6: John Peterson rated it it was alxe Nov 16, Inflation theory is not set in stone yet, there are still many problems with explaining large scale structure and dark matter. Apr 04, Jan rated it really liked it Shelves: Oct 14, Jamie rated it it was ok Vvilenkin it for: Loeb has taken care of that.

So if the only thing in the Universe were black holes, it is still not impossible that some configuration could evolve with the intelligence to ask about its own origins….

Alex Vilenkin – Many Worlds in One – Cosmic Variance : Cosmic Variance

If you are specifically interested in anthropic discussion, there is a great piece from the book on Edge. No trivia or quizzes yet. A theoretical search for parallel universes This book is not for the faint hearted; it requires basic knowledge of physics and cosmology.