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Fundamental constants of nature and their possible time variation
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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
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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2016, Tutor: Joan Solà Peracaula
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BERNÁRDEZ GIL, Guillermo. Fundamental constants of nature and their possible time variation. [consulted: 7 of October of 2026]. Available at: https://hdl.handle.net/2445/96261