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EnglishWe give an interpretation of the temperature in de Sitter universe in terms of a dynamical Unruh effect associated with the Hubble sphere. As with the quantum noise perceived by a uniformly accelerated observer in static spacetimes, observers endowed with a proper motion can in principle detect the effect. In particular, we study a "Kodama observer" as a two-field Unruh detector for which we show the effect is approximately thermal. We also estimate the back-reaction of the emitted radiation and find trajectories associated with the Kodama vector field are stable.
http://hdl.handle.net/11572/89974| Titolo: | On The Unruh Effect In De Sitter Space |
| Autori Unitn: | Acquaviva, Giovanni Di Criscienzo, Roberto Vanzo, Luciano |
| Anno di pubblicazione: | 2011 |
| Titolo del periodico: | MODERN PHYSICS LETTERS A |
| Abstract: | We give an interpretation of the temperature in de Sitter universe in terms of a dynamical Unruh effect associated with the Hubble sphere. As with the quantum noise perceived by a uniformly accelerated observer in static spacetimes, observers endowed with a proper motion can in principle detect the effect. In particular, we study a "Kodama observer" as a two-field Unruh detector for which we show the effect is approximately thermal. We also estimate the back-reaction of the emitted radiation and find trajectories associated with the Kodama vector field are stable. |
| Handle: | http://hdl.handle.net/11572/89974 |
| Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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