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http://hdl.handle.net/2445/12336
Title: | Bubble fluctuations in Omega less than 1 inflation |
Author: | Garriga Torres, Jaume |
Keywords: | Teoria de camps (Física) Ones gravitacionals Field theory (Physics) Gravitational waves |
Issue Date: | 1996 |
Publisher: | The American Physical Society |
Abstract: | In the context of the open inflationary universe, we calculate the amplitude of quantum fluctuations which deform the bubble shape. These give rise to scalar field fluctuations in the open Friedmann-Robertson-Walker universe which is contained inside the bubble. One can transform to a new gauge in which matter looks perfectly smooth, and then the perturbations behave as tensor modes (gravitational waves of very long wave-length). For ( 1 − Ω ) ≪ 1 , where Ω is the density parameter, the microwave temperature anisotropies produced by these modes are of order δ T T ∼ H ( R 0 μ l ) − 1 2 ( 1 − Ω ) l 2 . Here, H is the expansion rate during inflation, R 0 is the intrinsic radius of the bubble at the time of nucleation, μ is the bubble wall tension, and l labels the different multipoles ( l > 1 ). The gravitational back reaction of the bubble has been ignored. In this approximation, G μ R 0 ≪ 1 , and the new effect can be much larger than the one due to ordinary gravitational waves generated during inflation (unless, of course, Ω gets too close to 1, in which case the new effect disappears). |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.54.4764 |
It is part of: | Physical Review D, 1996, vol. 54, núm. 8, p. 4764-4769 |
URI: | http://hdl.handle.net/2445/12336 |
Related resource: | http://dx.doi.org/10.1103/PhysRevD.54.4764 |
ISSN: | 0556-2821 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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