Group Averaging of massless scalar fields in 1+1 de Sitter
| dc.creator | Marolf, Donald | |
| dc.creator | Morrison, Ian A. | |
| dc.date | 2008-08-15 | |
| dc.date | 2008-10-28 | |
| dc.date.accessioned | 2026-07-07T12:30:16Z | |
| dc.date.available | 2026-07-07T12:30:16Z | |
| dc.description | Perturbative gravity in global de Sitter space is subject to so-called linearization stability constraints: If they are to couple consistently to the gravitational field, quantum states must be invariant under the de Sitter isometries. While standard Fock spaces contain no de Sitter-invariant states apart from (possibly) the vacuum, a full Hilbert space of de Sitter-invariant quantum states can be constructed via group averaging techiniques. We re-examine the simple toy model of de Sitter group averaging given by the free 1+1 scalar field, expanding on an earlier analysis by Higuchi. Our purpose is twofold: to include the scalar zero-mode, and to explicitly count the number of de Sitter-invariant states as a function of an appropriately defined energy. | |
| dc.description | 14 pages, accepted to Classical and Quantum Gravity | |
| dc.identifier | https://arxiv.org/abs/0808.2174 | |
| dc.identifier | http://arxiv.org/abs/0808.2174 | |
| dc.identifier | Class.Quant.Grav.26:035001,2009 | |
| dc.identifier | doi:10.1088/0264-9381/26/3/035001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/216084 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Group Averaging of massless scalar fields in 1+1 de Sitter | |
| dc.type | text |