| Domaine : |
 |
|
|
| Titre : |
|
A natural fuzzyness of de Sitter spacetime |
|
| Auteur(s) : |
|
J.-P. Gazeau1, F. Toppan |
|
| Laboratoire : |
|
|
|
| équipe(s) de recherche : |
|
APC - THEORIE |
| Résumé : |
|
A non-commutative structure for de Sitter spacetime is naturally introduced by replacing ('fuzzyfication') the classical variables of the bulk in terms of the dS analogs of the Pauli-Lubanski operators. The dimensionality of the fuzzy variables is determined by a Compton length and the commutative limit is recovered for distances much larger than the Compton distance. The choice of the Compton length determines different scenarios. In scenario I the Compton length is determined by the limiting Minkowski spacetime. A fuzzy dS in scenario I implies a lower bound (of the order of the Hubble mass) for the observed masses of all massive particles (including massive neutrinos) of spin s > 0. In scenario II the Compton length is fixed in the de Sitter spacetime itself and grossly determines the number of finite elements ('pixels' or 'granularity') of a de Sitter spacetime of a given curvature. |
|
Langue du texte
intégral : |
|
Anglais |
|
Date de production,
écriture : |
|
30/06/2009 |
|
|
| Journal : |
|
| Classical and Quantum Gravity (Class. Quantum Gravity) |
| Publisher |
Institute of Physics: Hybrid Open Access |
| ISSN |
0264-9381 (eISSN : 1361-6382) |
|
|
| Audience : |
|
internationale |
|
| Type de publication : |
|
Articles dans des revues avec comité de lecture |
|
| Date de publication : |
|
01/2010 |
|
| Volume : |
|
27 |
|
| Page, identifiant, ... : |
|
025004 |
|
|
| Commentaire : |
|
16 pages |
|
|
Récupérer au format
