Document Detail


Phenomenologically viable Lorentz-violating quantum gravity.
MedLine Citation:
PMID:  19659067     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Horava's "Lifschitz point gravity" has many desirable features, but in its original incarnation one is forced to accept a nonzero cosmological constant of the wrong sign to be compatible with observation. We develop an extension of Horava's model that abandons "detailed balance" and regains parity invariance, and in 3+1 dimensions exhibit all five marginal (renormalizable) and four relevant (super-renormalizable) operators, as determined by power counting. We also consider the classical limit of this theory, evaluate the Hamiltonian and supermomentum constraints, and extract the classical equations of motion in a form similar to the Arnowitt-Deser-Misner formulation of general relativity. This puts the model in a framework amenable to developing detailed precision tests.
Authors:
Thomas P Sotiriou; Matt Visser; Silke Weinfurtner
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Publication Detail:
Type:  Journal Article     Date:  2009-06-25
Journal Detail:
Title:  Physical review letters     Volume:  102     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-08-07     Completed Date:  2009-08-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  251601     Citation Subset:  -    
Affiliation:
Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
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