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http://hdl.handle.net/2445/128243
Title: | Quantum corrections to the gravitational potentials of a point source due to confromal fields in de Sitter |
Author: | Fröb, Markus Benjamin Verdaguer Oms, Enric, 1950- |
Keywords: | Teoria quàntica de camps Gravetat quàntica Pertorbació (Astronomia) Quantum field theory Quantum gravity Perturbation (Astronomy) |
Issue Date: | Mar-2016 |
Publisher: | Institute of Physics (IOP) |
Abstract: | We derive the leading quantum corrections to the gravitational potentials in a de Sitter background, due to the vacuum polarization from loops of conformal fields. Our results are valid for arbitrary conformal theories, even strongly interacting ones, and are expressed using the coefficients b and b' appearing in the trace anomaly. Apart from the de Sitter generalization of the known flat-space results, we find two additional contributions: one which depends on the finite coefficients of terms quadratic in the curvature appearing in the renormalized effective action, and one which grows logarithmically with physical distance. While the first contribution corresponds to a rescaling of the effective mass, the second contribution leads to a faster fall-off of the Newton potential at large distances, and is potentially measurable. |
Note: | Reproducció del document publicat a: https://doi.org/10.1088/1475-7516/2016/03/015 |
It is part of: | Journal of Cosmology and Astroparticle Physics, 2016, vol. 2016, num. 015 |
URI: | http://hdl.handle.net/2445/128243 |
Related resource: | https://doi.org/10.1088/1475-7516/2016/03/015 |
ISSN: | 1475-7516 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
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