Stochastic inflation: scaling solution for N fields
The Fokker-Planck equation for the primordial inflationary fluctuations is solved in the scaling approximation, when the classical drift dominates over the quantum diffusion. The scaling procedure is generalized to the case in which several fields are involved. The conditions imposed on the Kramers-...
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| Autore principale: | |
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| Natura: | Article (Journal) |
| Lingua: | inglese |
| Pubblicazione: |
1993
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| In: |
Classical and quantum gravity
Year: 1993, Volume: 10, Fascicolo: 7, Pages: 1267-1283 |
| ISSN: | 1361-6382 |
| DOI: | 10.1088/0264-9381/10/7/006 |
| Accesso online: | Verlag, Volltext: http://dx.doi.org/10.1088/0264-9381/10/7/006 Verlag, Volltext: http://stacks.iop.org/0264-9381/10/i=7/a=006 
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| Note sull'autore: | Luca Amendola, Osservalorio Aslronomico di Roma, Vide del Parco Mellini 84.1-00136 Rome, Italy |
| Riassunto: | The Fokker-Planck equation for the primordial inflationary fluctuations is solved in the scaling approximation, when the classical drift dominates over the quantum diffusion. The scaling procedure is generalized to the case in which several fields are involved. The conditions imposed on the Kramers-Moyal coefficients in order to derive the scaling variables turn out to be fulfilled in some simple multi-field case. An analytical solution in the case of a two-field inflationary model is worked out. |
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| Descrizione del documento: | Gesehen am 21.11.2017 |
| Descrizione fisica: | Online Resource |
| ISSN: | 1361-6382 |
| DOI: | 10.1088/0264-9381/10/7/006 |