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Title: | Fundamental constants of nature and their possible time variation |
Author: | Bernárdez Gil, Guillermo |
Director/Tutor: | Solà Peracaula, Joan |
Keywords: | Models astronòmics Cosmologia Treballs de fi de grau Constants físiques Astronomical models Cosmology Bachelor's theses Physical constants |
Issue Date: | Jan-2016 |
Abstract: | The possibility of a slow cosmic evolution of fundamental \constants" of Nature has been discussed for a long time without being consolidated; recently, however, more and more experiments are arising whose results seem to support this idea. Apart from that, in an expanding universe the vacuum energy density p is expected to be a time-evolving parameter rather than the rigid one proposed in the standard ACDM model; in fact, quantum feld theory in curved space time suggests a slow evolution determined by the expansion rate of the universe H. In this work, we will try to obtain and develop some cosmological models with such a a dynamical vacuum energy density, and at the same time we will check whether they can provide an explanation for the alleged slow time variation of the fundamental constants |
Note: | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2016, Tutor: Joan Solà Peracaula |
URI: | http://hdl.handle.net/2445/96261 |
Appears in Collections: | Treballs Finals de Grau (TFG) - Física |
Files in This Item:
File | Description | Size | Format | |
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TFG_Fis_Bernardez_Gil_Guillermo.pdf | 274.06 kB | Adobe PDF | View/Open |
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