skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The Definition and Classification of Universes

Abstract

We assume that the concept of a multiverse makes sense, and suggest a specific, standardized definition for member universes which are similar to our own. Central to this description is the definition of size, which is taken to be the asymptotic value, at large times, of the inverse Hubble constant. Thus the cosmological constant plays a central role in defining the properties of the subset of universes similar to our own. We then assume that vacuum parameters and coupling constants of the standard model are dependent upon the size of a universe, and propose a specific form for the dependence. Anthropic considerations then limit the size of habitable universes (as we understand that concept) to be within a factor two of our own. Implications of this picture for understanding the standard-model ''hierarchy problem'' are discussed, as are general issues of falsifiability and/or verifiability of these ideas.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC), Menlo Park, CA
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
839967
Report Number(s):
SLAC-PUB-10676
TRN: US0503422
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CLASSIFICATION; COSMOLOGICAL CONSTANT; COUPLING CONSTANTS; STANDARD MODEL; UNIVERSE

Citation Formats

Bjorken, J. The Definition and Classification of Universes. United States: N. p., 2004. Web. doi:10.2172/839967.
Bjorken, J. The Definition and Classification of Universes. United States. doi:10.2172/839967.
Bjorken, J. Tue . "The Definition and Classification of Universes". United States. doi:10.2172/839967. https://www.osti.gov/servlets/purl/839967.
@article{osti_839967,
title = {The Definition and Classification of Universes},
author = {Bjorken, J.},
abstractNote = {We assume that the concept of a multiverse makes sense, and suggest a specific, standardized definition for member universes which are similar to our own. Central to this description is the definition of size, which is taken to be the asymptotic value, at large times, of the inverse Hubble constant. Thus the cosmological constant plays a central role in defining the properties of the subset of universes similar to our own. We then assume that vacuum parameters and coupling constants of the standard model are dependent upon the size of a universe, and propose a specific form for the dependence. Anthropic considerations then limit the size of habitable universes (as we understand that concept) to be within a factor two of our own. Implications of this picture for understanding the standard-model ''hierarchy problem'' are discussed, as are general issues of falsifiability and/or verifiability of these ideas.},
doi = {10.2172/839967},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {10}
}

Technical Report:

Save / Share: