| Subject: |
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Physics/General Relativity and Quantum Cosmology
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| Title: |
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Critical Overview of Loops and Foams |
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| Author(s): |
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Sergey Alexandrov ( )1, Philippe Roche ()1 |
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| Laboratory: |
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| Abstract: |
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This is a review of the present status of loop and spin foam approaches to quantization of four-dimensional general relativity. It aims at raising various issues which seem to challenge some of the methods and the results often taken as granted in these domains. A particular emphasis is given to the issue of diffeomorphism and local Lorentz symmetries at the quantum level and to the discussion of new spin foam models. We also describe modifications of these two approaches which may overcome their problems and speculate on other promising research directions. |
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| Fulltext language: |
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English |
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| Production date: |
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2010-09-22 |
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| Journal: |
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| Physics Reports (Phys. Rep.) |
| Publisher |
Elsevier |
| ISSN |
0370-1573 |
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| Audience: |
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international |
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| Publication type: |
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Article in peer-reviewed journal |
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| Publication date: |
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2011-05-17 |
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| Volume: |
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506 |
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| Issue: |
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3-4 |
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| Page, identifiant, ...: |
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41-86 |
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| Comment: |
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75 pages |
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| Internal note: |
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LPTA:10-063 |
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